Are the so-called “flash-mobs” springing up in cities around America a serious movement or a quick-to-pass fad? “Whether one views them as part of a serious social movement or a form of quirky entertainment (or both), flash mobs are perfectly appropriate for this town. Historically, San Francisco has been rife with pranking and performance art organizations. Loosely organized groups of merrymakers – including the Amateur Press Association, the Church of the SubGenius, Survival Research Laboratories, Billboard Liberation Front, the edgier Suicide Club, Santarchy, and the still-kickin’ Cacophony Society – have been tugging San Francisco’s pigtails since the turn of the 20th century.”