Common police strategy for preventing flash mobs has been tightening of curfews. Aug. 27, 2011— -- When a massive flash mob rampaged outside the Wisconsin State Fair injuring 11 fairgoers on Aug.

SHAKER HEIGHTS, Ohio (AP) - The July 4 fireworks display in the Cleveland suburb of Shaker Heights was anything but a family affair. As many as 1,000 teenagers, mobilized through social networking ...

They say so-called flash mobs are sneaking into apartment buildings at night, taking over community rooms by partying and causing damage.