Sean Savage, a 31-year-old San Francisco designer and weblogger who has followed flash mobs, said these kinds of semi-anarchic gatherings have roots that go at least as far back as the late 1970s. Savage said San Francisco groups like the Suicide Club and the Cacophony Society have been staging group pranks in the city for decades, while Santa Rampage has been an annual San Francisco tradition for nearly a decade and has spread to more than 15 cities worldwide.
Hmmm... I wonder whether this would transplant well to Melbourne. (Wasn't the "SPONTANEOUS CHOIR" graffiti one sees around from time to time connected to some similar phenomenon?)
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