You can rent them out as flash mobs
You get different price plans too, like Disgruntled mob, Mildly Angry mob and Riot mob.
( Keyboard Weasel, Tue 12 Sep 2006, 13:30, archived)

O RLY?
Mildly Angry eh?
( mr horrible put his trousers on really angrily on, Tue 12 Sep 2006, 13:32, archived)

i installed that in my final year to waste time
i was so crap at it

*makes angry mob noise anyway*
(GoldenFanjita, Tue 12 Sep 2006, 13:32, archived)