It doesn't seem so much about tradition anymore as about ending up on Sports Center or getting hits on YouTube. Peoples tendency to take things to far is as much to blame as Bettman, an opinion that probably won't get me many friends around here.
The thing is if your going to cite people for this you better start citing people for chucking a hat on the ice. IMO that could be considered discriminating by singling out one group.
Out of 20,066 people that could be throwing them, I don't think 7 is really that bad, as long as they're being thrown at appropriate times. It's not like all those people coordinate before the game. What are the other 6 people gonna do after the first is thrown? Just keep the octopi strapped to them and take it home for next time?