A mob of people quickly forms and it is leading to violence, thievery and property damage in both inner cities and the suburbs. These flash mobs are causing problems for citizens, store owners and public officials alike, and their age may be playing a role in this disturbing behavior, according to Frank Farley, a professor in Temple's College of Education. "The age range is interesting — in most of these riots, it tends to be in the teenage to early 20's, by and large," he said. "That's a big age for thrill seeking and risk taking."