"The Straw Hat Riot - The day men were beaten for wearing the wrong hat" recounts one of the most bizarre episodes of mass violence in New York City history. In 1922, there was an unwritten social rule: You must stop wearing straw hats on September 15th. Anyone wearing one after that date was considered socially unacceptable.Historian James Pike details how this fashion faux pas escalated into anarchy. Groups of teenagers roamed the streets of Manhattan, snatching straw hats off men's heads and stomping on them. The pranks turned violent when men defended their hats, leading to a city-wide...