Doing that is dumb, classless and ridiculous, and — fairly or unfairly — manages to take at least some of the shine off very cool crowd moments like this one, where Boston Celtics fans who stuck out the final minutes of a 19-point blowout remained in full through game's end to properly send their team off to Game 7:

See? That is a cool way to do your fan business. Friends helping friends, banding together to fight through how upset you are at having watched the Celtics catch a furious whipping, and choosing to express boosterism in a positive way rather than by throwing beer on the man who just legendarily sonned your whole crew.