Privacy rule

I read a lot of / am highly into cypherpunk ideology. I work hard to protect my privacy.

But I also have shitty bottom rung / entry level jobs. ALL of them use apps with atrocious privacy policies for group messaging and posting schedules.

A) I am a cashier. Why do you need to be able to reach me 24/7?

B) It makes all my effort trying to keep a minimal digital footprint moot when I am forced to share tons of personal info to register. And I am also required to get the app.

C) No corporate manager who also hates their job is trying to listen to my diatribe about why "WhatsApp" is evil.

I am seriously considering buying a prepaid flip phone and pretending that's my "real" phone for my next job. That's the only solution I can think of. But I just hate that it's a problem at every $10/ hour job.