Oh, I understand that well enough. But I wonder if you've considered the dangers of mob mentality in dealing with such as issue?
As I mentioned before on another thread, one can deal with this easily enough, and do so legally. First, do an ID check. Those violating the curfew are taken in and their parents called to come get them. A citation is issued. Next, one does an ID check and determines whether there are any outstanding warrants (i.e., unpaid traffic tickets). A warrant is a court issued document that requires a Peace Officer to arrest the individual...so, obey the court order. Arrest them. Public Intoxication is a legitimate crime. Conduct field sobriety tests, and arrest those guilty of same. On vehicles that are present, conduct safety inspections before permitting them to be operated. A cracked tail light means that the vehicle cannot lawfully be operated on a public roadway.
After a few iterations of such thorough enforcement, the crowds will depart. And every single action I've mentioned is legal.
The problem with the current action is that innocent people who broke no law were arrested. In fact, it appears bunches of them were. Now what are nice, law abiding people like you and I to do when it happens to us? For we cannot know when we'll happen to be in the wrong place at the wrong time.
Some of the gestapo "cops can do no wrong" types figure that decent, law-abiding citizens have no business being out after midnight, even on a Saturday night.
If you read the articles on this, the things you mention (citations etc...) are what had been taking place for weeks on end without ending the problem.