I do not think I have ever before had the urge to go start a flamewar on a hockey board

OK, so if we're talking NHL rule changes, let's try this: If someone's going to be disciplined for a dirty shot resulting in concussion or other serious injury?

You get suspended, and you can come back when the guy you hit comes back.

Sure it's arbitrary and unfair and depends heavily on luck. So does the long-term recovery and prospects of players with concussion.