The unwritten rules that permeate our social lives are deadly serious, and often very stupid. Case in point: the 1922 Straw Hat Riot, when New York City youths spent eight mid-September days beating up men who were wearing straw hats, because it was no longer appropriate to wear straw hats, which were summer hats. Fashion!
Sports and games are lousy with unwritten rules, which can also be stupid and can also have violent consequences. In baseball, for
