I can concur with some points made on both sides of this argument. Mike brought up a great point that some fans that are so strongly associated with the team assume they assume a role within the team. They'll do things that they believe is helping "our" team.... Could be yelling/taunting at a player to throw them off their game, waving signs behind a backboard while someone shoots a free throw, etc. I also concur with gunnarthor's point that bigots will be bigots. It is now an emotionally charged series because of the slide, near beaning, etc. In that environment with 30K+ people, access to alcohol, a person's true colors can come out. In conclusion, if they weren't enforcing unnecessary "unwritten rules" the environment wouldn't be so tense and hostile. And most likely prevents a bigot from feeling empowered enough to spew hate in public... BUTTERFLY EFFECT.