[Rick Lee]

People riot because they know no one will stop them. Cops aren't even allowed to use force to stop property damage. They certainly can't use deadly force. Idiots know this and are encouraged by it. Once there are more than a handful of bad actors, they know they'll be free to run ramapant. Nowadays only the surveillance cameras can help get them later. This used to happen a lot in College Park, MD when the Terps won a championship. Then U of MD starting catching them later and expelling them and that has calmed it down a little. But I don't think anyone ever goes to jail for more than a day for this stuff.