Danger and Prevention (or not)
So while reading Yahoo! Sports NHL page, there is an article discussing eliminating fighting from hockey. However, when looking at the list of serious injuries at the end of the article, only two were from fights with one leading to a fight and one a suckerpunch before a fight. The other week, the announcer on NBC (who has spent more time behind a microphone than on the ice) talked about forcing players to wear eye protection. However, the play that led to his comment was when a goalie hit a player in the face with his stick, a penalty not called.
This is where this segues into a political discussion. Instead of banning something, look at a root cause. If the goalie had been hit with a penalty when he hit a guy with his stick, maybe next time his stick won't come up that high. If the skater had been wearing a face shield, what would have stopped the goalie from raising his stick? What would stop anyone? This ties into a study done on car safety. When cars are made safer so that people in the car are not injured in an accident, there is actual more danger to other people on the road. I could give you the economic reasons for this, but would suggest you look into the podcast "Peltzman on Regulation" at www.econtalk.org.
Now, going back to fighting, what would happen if there were no instigator rule, where if a player starts a fight there is no added on penalty? How likely would a player on the other time be to rough up a star player if they knew that guy's teammate would come kick their ass? Like everything else, regulation changes people's incentives, both positive and negative, and thus change behaviors.
You know what other argument is very similar to this, the city that bans guns vs. the one that "requires" them. No one would ever expect the city that bans guns to be more dangerous, but it is. In logical terms (using real words instead of economic ones) what criminal in their right mind would attack someone when that person could be armed? Now, how many criminals would willingly attack someone who they know is unarmed if that is how they operate? The regulation that bans guns thus makes the criminal safer and more willing to attack.

