Sitting at Granny's listening to her scanner, I often hear about large crowds gathering all of sudden and fights breaking out. I sometimes think that these large crowds may be flashmobs. What is a flashmob? From Wikipedia:
A flash mob (or flashmob) is a large group of people who assemble suddenly in a public place, perform an unusual action for a brief time, then quickly disperse. The term flash mob is generally applied only to gatherings organized via social media or viral emails, rather than those organized by public relations firms or for a publicity stunt.
Organizing a "flash mob" basically involves e-mailing a bunch of people with instructions to show up at a certain place for a few moments, then disappear. Flashmobs are mainly used by guerrilla marketers.
If you think about it, the ability to organize flashmobs would also be effective for gang activity. Could this be what is happening in our fair City - flashmobs with "thug pants" instead of gold lame Hammer pants?