Earlier quoted context omitted.
The police here are remarkably tolerant of most victimless crimes, thankfully.
This sort of raves violates all sorts of environmental and health and safety codes. It only takes one fire with a couple dead to make them all go away. Look, I used to like raves when I was younger, but it's silly to claim that anybody should be allowed to organize anything anywhere without regard for the neighbors, safety of visitors or work load of emergency services.
Moreover, I wonder how many right-side events also violate the aforementioned overly-onerous codes.