A very intriguing sports discussion is whether or not to ban fighting in the NHL...I'd say leave it. Hockey is probably the dirtiest sport, and a lot of times necessitates retaliation in order to maintain order/etc. Example, check out what happened last night.
J.P. Dumont (NSH) got cold-cocked by Burrows (VAN) when he didn't have the puck and wasn't paying attention. Burrows came way off the ice to level him and it left him dazed badly, and there was no penalty. It was ridiculous. 4, 5 seconds later the NSH captain, Jason Arnott, skates in for retaliation. A hit like that doesn't go unpunished.
Watch: