There's quite a few things actually. I mean its technically assault, probably some sort of nuisance law violation, probably a violation of their permit, etc. Don't act like everything they're doing is just permissible because they're a mob.
I have to say these people are growing on me. I still think overall there's a huge group of idiots overshadowing the people who have a clue, but they've managed to get some sort of message out there. If they could just stop being such fucking dicks in a lot of ways it would be way better. The property destruction, police antagonism, etc. really should stop.