Warriors head coach Steve Kerr clearly does not buy into many of basketball’s unwritten rules. “I’m on a one-man crusade to dispel these idiotic NBA rituals,” Kerr said. Here was the situation: Warriors guard Shaun Livingston took a mid-range jumper with about three seconds left in Game 1 of the NBA Finals on Thursday night, and his team ahead 122-114. The shot clock was about to expire. So, as Kerr instructs his players to do, Livingston launched. Cavaliers center Tristan Thompson took exception to this, because the outcome already was decided. Thompson contested the shot with a high elbow, received a flagrant foul and was ejected. This led to the skirmish between him and Draymond Green. Thompson