Irvine/Orange County is notoriously conservative with stuff like that, but they already ok'd the event obviously, so at this point those people should just deal with it. Plus Bamboozle Left was there a few years ago and the city didn't burn down or anything.
They did the year I went. The time that Vinnie played Movielife songs w/ Set Your Goals. The year after was awful though. I turned down free tickets to go.