Waaalllll, in the olden days, we called the things where people overturned cars and set things on fire and scared people, we called them......
RIOTS.
I don't think we added "mobs" to the name back then. Nowadays, there's this thing called "Flash Mobs" and that's alotta fun, wherein folks who want to have a good time get together and everyone dances the same dance in public or does some kind of what some old hippies

used to call "performance art". Now, the thing is...no-one was hurt, no buildings were burned, nobody was harassed (unless maybe they were "the man"

).
If you ask me, the Philly media types mish-mashed a fun, light-hearted activity with a nasty, mean-spirited somewhat-criminal venture...they have slandered the good name of Flash Mobs

.
Maybe take out "mob ' and call these arranged acts of mayhem "Flash Riots"?
I don't know, it just seems that Flash Mob dancers and performers have so much fun and it seems so cool...it makes me sad that their light-heartedness has gotten smeared with the harassment activities of the Flash Riots.
agnes!