The fire alarm, which Bowman's office suggested was unintentional, came as Democrats were trying to delay a vote after Republicans rushed to pass the stopgap measure.
Oh, boy. Here comes the shitstorm. What an idiotic thing to do. Guarantee this is going to start a whole campaign to get him arrested or resign as well.
It wasn't to disrupt the vote. It was an arguably bad attempt to delay the vote so they could read it before voting. This is like getting angry and a starving kid stealing a loaf of bread. Is it illegal? Sure. Is it wrong? Absolutely debatable.
And technically they can't get arrested without getting impeached or expelled. Which you mentioned both consequences, but they need to be in that order. And it'd look really silly and likely not lead to expulsion without the Republicans looking bad. So they'll just let their extremists whine loudly about it and submit bill ands the like that will go nowhere, but keeps it in the news so they can talk about it in sound bites.
The usually cause more problems than they help adress- and there’s enough security in the capital complex that i would be shocked if they ever get pulled as any thing more than “oh we’re evacuating anyhow and I always wanted to pull them.”