Wow, I just read the review that Carla pointed to. What a nightmare for those folks. I can't imagine that it got that far out of control and no one did anything about it.
When I was a teenager in Los Angeles (no, it wasn't in the 1800s) the local radio station (KRLA) sponsored the KRLA Zuma Beach Party. It was supposed to be something family oriented, but turned into a scene as described in the review. It went on for a couple of hours until the police finally shut it down. The radio station did nothing to alter the behavior and in fact, encouraged it.