You see it all the time in Dealey Plaza: human squirrels tempting fate by standing on the white spray-painted X where John F. Kennedy was shot by anywhere from one to 30 gunmen. Never mind that you are standing in the middle of Elm Street, in a town whose citizens disregard all pretense of Texas courtesy while behind the wheel of a vehicle. How long before some tourist secures a place in history by getting smushed by a Ford pickup on the same spot where Kennedy met his violent fate? Maybe then there will be two white X's on the road.