Well I guess I understand the impetus now, but I still do not think the reaction is the right one.

If the cops are going to be there, then they should be patrolling and protecting everyone who is there to enjoy themselves. If people misbehave regardless, then I guess they are incouragable savages, but the occasional late night fiasco should not mean that the public space gets ruined for all time and all people.

I agree with JC Krause. This is the big city. Shit will happen. But move on, and consider whether taking things away from the public at large could possibly make the city better.