that's why hockey is the best sport. the players police themselves. if you take a cheap shot, you're going to get your ass kicked.
in football, defensive players (who never get hit) have bounties out against offensive players and there are no repercussions.
ray lewis can break a running backs leg, but if you try to fight him, you get ejected and suspended.
in hockey it's 1 on 1 fighting and you get thrown out for 5 minutes.