What can an individual do to fight against tech billionaires?

On your own? Not much. You can stop using certain products, save money, and so on. But that's mostly going to help make your individual existence a bit better/less bad. The CEO's aren't gonna give a flying fuck.
But our strength is in our numbers. Get organized. Maybe in a political party, maybe "just" in some sort of collective that helps in an area you care about. Help others in whatever capacity fits your abilities and your situation. And don't expect it to be a quick victory. That will only result in disappointment. As a wise man (?) once so succinctly put it: "Apes together strong."

All billionaires should be required to prove they’re not made of cake.

Stop using and/or buying their products comes to mind.
Adblock, Firefox, don't buy new phones, etc etc etc

Individually? Nothing. Therefore: Organise, organise, organise
- Computer, who is Luigi Mangione?

The first thing you can do is not buy anything that makes the tech billionaires more money. All they care about is money: don't give them any if you can help it.
- for example:
  get off of facebook (easy). don't buy tesla or use starlink (easy). don't buy on amazon (difficult but doable). Don't upgrade your iphone, and don't buy new apple products (moderate). Don't use CHATGPT (easy).
  
  Use Linux and open source software. Contribute to open source projects. Buy hardware second hand. Use non corporate social media. Buy local. Get your stuff fixed instead of throwing it away. Avoid data harvesting where possible.
  
  Getting off Amazon was easier than I thought. Has been years now, and I only needed to order through a friend once, when I needed a specialty item I could find nowhere else. Most small shops have comfortable checkout systems now and short delivery times. And there's eBay, which afaik takes a smaller cut from third parties than Amazon.
  
  I'd add not using Amazon Prime, Amazon Web Services and other Amazon services. Not using X, being critical of SpaceX. Also, stop advertising these things, stop telling your friends about them, maybe even stop talking about them altogether. I think for some strange reason sometimes bad press is better than no press.
  
  or use starlink I don't know if I'd call that easy for some people in very remote areas. Easy for me, easy for you, but not necessarily easy in some cases. Here's hoping a good competitor can get to those places.
  
  I use chatgpt a lot, what is the best non-billionaire funded llm? I really need to change to one that doesn't worsen the world...
- But it will make me mildly uncomfortable! /s

The solution is simple, but not easy: Stop using their products. A mass exodus of their users will quickly take away their power.
Stop using all Alphabet/Google products. Other search engines, email providers, streaming video, and even cell phone operating systems exist. Switch to them.
Stop using all Meta products. Other social networks and messaging applications exist. Switch to them.
Stop buying from Amazon and watching their streams. Other online stores and streaming media exists. Switch to them.
Keep going for every company who has a billionaire CEO, owner, or shareholder. Their fortunes will evaporate quickly.

- https://www.bbc.co.uk/programmes/p0gmsfr3
  3 minute scene from planet earth series with seals chasing a great white shark away

People keep answering by trying to tell you to consume your way out of this.
There is only one way, organize, unionize and vote!
- Voting? Really? You still think the corrupt system can be fixed using the corrupt system?
  
  Many will believe that forever

Instead of spending 200$ a month on subscriptions, spend 300$ on a used PC, take a weekend to learn how to selfhost/pirate and then pay 5$ for a trustworthy vpn like mullvad. If you're in the EU, send data deletion requests to every big company you've had an account with. Start buying things off local retailers, not Amazon. Buy computers/phones either second hand or from smaller/more trustworthy manufacturers...
And most importantly. NEVER. STOP. COMPLAINING. ABOUT. IT. The moment the complaints stop is the moment that bullshit is accepted...
- Not sure if this is really accessible for everyone.
  It's probably easy to underestimate how difficult setting up and managing services can be.
  
  YunoHost is what I use and its mainly been smooth.
  
  You don't need to do everything I mentioned, doing one of those things is more than enough... You don't need to self host, I know it's hard, I'm just putting it out there as an option :>
  
  It's not hard and there's plenty of people, like myself, that are willing to help you. Let's work together.
  
  I set up a Jellyfin server on a 10 year old laptop that sits closed in the corner and I have access to play the content from my TV in the living room and bedroom, and any other device that I connect to my network and it was fairly simple. Finding content is likely the hinge that holds more people back. My lazy ass didn't want to have to go to the corner to acquire content so I set up rustdesk on my phone so I can remote to the laptop from my phone, turn the VPN on to hop to Madrid or so, and acquire what is wanted then remote to it later on to take it back off the VPN. (Allows me to do such when out and about, say someone mentions a movie or show when at work)
  Was going to see if I could punch a hole with tailscale so I could leave the Jellyfin server local and just share the drive so I could write to it from "Spain" while read from it on the TV without having to switch the VPN on and off but haven't had a a few hours to spend on that yet. The shared drive is an old 5400rpm drive and it'll play movies at 1080p in 2 rooms without issue. (I don't bother with 4k, my eyes really aren't good enough to find the storage space use worth it)

- I'm not condoning violence but I'm kind of surprised no one have yet taken an RPG shot at elons jet or something. Even blowing it up empty would send a message I guess.
  I mean someone actually shot at drump so it can't be that complicated.
  
  I mean someone actually shot at drump so it can’t be that complicated.
  Firstly it wasn't an RPG. I don't think you realize how complicated it is to get your hands on a functional RPG. Not to mention, if you want to blow up Musk's aircraft, you probably want a portable surface-to-air missile like a Stinger. Good luck getting one of those too.
  Secondly the dude missed Trump, so it is a bit complicated. You need some sniper skills he obviously didn't have, and a lot of preparation - and probably a good dose of luck - to set yourself up for a shot and not get caught.
  Thirdly, the dude was wasted. So anybody thinking about fixing America's problems that way should feel ready to lay down his life for the cause. People usually talk the talk but rarely walk that kind of walk.
- Pull a Luigi

Halt excess spending. Don't spend a single dime more than necessary to survive. You are gonna need every penny in your bank account if you hope to make it the next 2 years.
Oh, and don't count on democratic politicians to do anything about anything. They fear progressives more than a fascist Trump regime because they are all in the pockets of those tech billionaires.
If you're a person with brown skin, I hope and pray for you and am donating what little I can to organizations who are trying to protect immigrants and non-whites.

Pirate, AdBlock/Sponsorblock and use Free/Open Source alternatives.

Years ago people laughed at me for not having Facebook (and never having had it in the first place). Who's laughing now? Not me, nor any other consumers. But hey, we tried...

Who are those two in the picture? Are we supposed to know them?
- that's edited photo, original is just as derpy. it's altman and nadella
  btw this is very much a "heartwarming - the worst people you know are fighting" sitution

Call Luigi?
- Luigi did his part. One luigi per ceo not one luigi for all the ceos
  
  While I don't expect more of this person, going the Batman/Jesus route would be helpful.
  Edit: Although, I prefer the V for Vendetta method where we all anonymously fight back and take back over.
- Assuming Luigi Mangione is responsible for the murder of that CEO strips him of his presumption of innocence. Maybe refer to the gunman from the video as "The Adjuster" like people did before Mangione was accused until the trial is complete.
  
  But if he's not the shooter, what if the real Adjuster isn't as hot as Luigi?
  (I'm just kidding though, I totally agree with you)
  
  That’s a great insight! However, there’s only one true Luigi…

An individual can do very little.
Which is why we organize, strike, and practice solidarity, together.
If you want to help, look for left movements in your area. Food Not Bombs for example.
- Find out what National union would support your profession and go help them out.

artillery

        antiaircraft gun
    antitank weapon
    Big Bertha
    cannon
        French 75
        Vulcan automatic cannon
    coastal artillery
    German 88
    Maxim machine gun
    mortar
    Panzerfaust
    Panzerschreck
    Paris Gun
    Schwarzlose machine gun

biological weaponry

        anthrax
    plague
    Q fever
    ricin
    smallpox
    yellow rain

chemical weaponry

        adamsite
    diphosgene
    hydrogen cyanide
    lewisite
    nerve gas
    phosgene
    tear gas
        chloropicrin

combat weapons ranged weapons

        bola
    boomerang
    bow and arrow
        crossbow
        longbow
    grapeshot
    flamethrower
    Greek fire
    sling
    spear
    spear-thrower

hand-to-hand combat weapons

        bayonet
    club
    dagger
    halberd
    lance
    pike
    quarterstaff
    sabre
    sword
    tomahawk

explosives bombs

        depth charge
    dirty bomb
    grenade
    improvised explosive device
    mine
    shrapnel

explosive substances

        PETN
    RDX
    trinitrotoluene (TNT)

missiles ballistic missiles

        antiballistic missile
    ICBM
    Lance missile
    Peacekeeper missile
    Minuteman missile
    Nike missile
    Polaris missile
    Poseidon missile
    torpedo
    Trident missile
    V-2 missile

cruise missiles

        Tomahawk
    V-1 missile

rockets

        bazooka
    Congreve rocket

firearms manual

        air gun
    blowgun
    blunderbuss
    carbine
        Spencer carbine
    Gatling gun
    handgun
        pistol
        revolver
            derringer
    harquebus
    musket
    rifle
        Dreyse rifle
        Lee-Enfield rifle
        Mauser rifle
        Springfield rifle
    shotgun

semiautomatic

        handgun
        pistol
        semiautomatic pistol
            Luger pistol
        revolver
    rifle
        assault rifle
            AK-47
            ArmaLite rifle
            M16 rifle
        Garand rifle
        repeating rifle
        Springfield rifle

automatic

        handgun
    machine gun
        Bren machine gun
        Browning automatic rifle
        Hotchkiss machine gun
        MG42
        MAG machine gun
        Maxim machine gun
        Schwarzlose machine gun
    rifle
        assault rifle
            AK-47
            M16 rifle
        Browning automatic rifle
    submachine gun
        Sten gun
        Thompson submachine gun
        Uzi submachine gun

nuclear weapons

        intermediate-range nuclear weapons
    tactical nuclear weapon
    thermonuclear bomb
        atomic bomb
        neutron bomb
    weapon of mass destruction

siege weapons

        battering ram
    Big Bertha
    cannon
        French 75
    catapult
        onager
    culverin
    German 88
    ram
    Vulcan automatic cannon

I refuse to recognize a trebuchet as a form of catapult. Just as you have had to separate handguns and rifles, one should also recognize a trebuchet's superior siege ability at range
- I will send a strongly worded letter to the random website from which I copied and pasted this.
Shit. You said my trigger word.
https://youtu.be/yRGgl9KT9rE

Fight for regulation
The only thing that can stop them from their established position of power and influence is regulation that limits those, with effective checks and prosecution.
Split up their platforms and companies, require transparency and provable decency, require structural or behavioral changes
They have so much money, fines won't do a thing [unless they're excessively high and against their companies]. They have such established prevalence with their platforms, activism of and with evasion won't have much of an impact at scale.
Demonstrating public aversion towards advertisers is also a workable approach that could have an impact [long term].
- I'm all for that, BUT
  Tech companies tend to push for policies that seem to regulate their strategies, but are really designed to not let anyone else use the loopholes they used for themselves. In that they are trying to weed out competition and become a monopoly. So if there are regulations, they need to be thought through. And definitely not be Big Tech backed.
  
  EU has recent regulations that only apply to the big platforms. That's one way to implement that.

You start by 3D printing a gun.

Do what you can. A little more each day if it gets easier. Understand we can't fight all the worlds evils alone, but we aren't alone so whatever your fight is helps all of us.
I push for opensource, self hosting, being self sufficient, unionizing (at work, and for tenets), forming coops (worker, community, housing, and even producer coops), do mutual aid, support charities through donations sure but also volunteering. I also try to buy less, if you need it you need it, but if you don't then why support corps like Walmart or Amazon for them to take those profits to undermine us.
Again it's not about perfection or even self actualization, it's just every time we can empower ourselves and others we can shift the power balance.