Appalling Behavior in Boro Park

The Boro Park rioting has been covered quite thoroughly in the J-blogs already, as well as in the local papers. I would like to add, though: Ugh. This is a huge Chillul Hashem. I'm told by a Boro Park resident that a large majority of the mob seemed to be older teenagers, likely home from Yeshiva on Bein Hazmanim. The worst parts of the coverage:

(NY Daily News)
As rumors spread through the crowd that Schick had been beaten, tensions escalated and hundreds of people in traditional black garb poured onto 16th Ave. from 46th to 50th Sts. They set fire to old magazines, fruit boxes and other trash up and down the avenue.

Firefighters raced to put out at least seven blazes and water down the streets.

Demonstrators smashed the windows of one police cruiser and torched another by throwing a gasoline-soaked rag into its backseat. A helicopter searchlight swept the street, and riot police formed lines along 16th Ave., hollering, "Back on the sidewalk!"

But protesters didn't heed the warnings and ran through the streets, some yelling, "Nazi Germany!" at the officers.

The question is, somehow most of these teenaged boys can be prevented from going online, going to movies, or talking to girls, yet why does no one seem to have any control over them when they decide to go on a destructive rampage?

Update: Another point that comes to mind is that it seems strange that this mob thought it would be advisable to trash and set fires in their own neighborhood. Who's gaining here? They still have to live there.