I'm all for disrupting the normal course of everyday life. Flashmobs fasinate me. Or at least they did when people were doing them. I remember reading about how hundreds of young people staged a Matrix Reloaded Mob event in Tokyo. They were all dressed as Mr. White. They were there because they were fans. It meant something to them.
I guess that's why I don't yet understand the point of Improv Everywhere and its public stunts. Harmless shock value? Sure. Aged drama students lusting after high school days gone by? Maybe. Attention-starved lonely hearts? Totally!
Interestingly there is enough interest in the scenes they create that they have sold a pilot to NBC. I guess it's kind of like Punk'd but instead of one celebrity, they're punking the general public. Yaaawn.