And Maurice Dubois reported in this CBS 2 investigation, the teen mobs have left neighborhoods worried as businesses take matters into their own hands.

Judson Bennett, 78, recently ran into a violent group of teens – often described with the once-benign term “flash mob” – as he made his daily trip to buy a newspaper at his favorite news team.

“I’m approaching the newsstand, and then suddenly there is a tremendous force behind me,” Bennett said.