LOL. Okay. Under the new rules, the two defensemen can't come into the fray anymore. So, let's amend that to a scrum of 8 players in the crease after a puck is frozen. Good enough for you Coach Bowman?
I presume you are referring to the instigator rule which has nothing to do with defensemen, but with the fact that a 3rd player inserting himself in a fight or skirmish is immediately given a game misconduct. So by the time there are 8 guys fighting you have a good old fashionned brawl. However this is not the place to discuss hockey,and if you want to post on hockey I'll be happy to join the discussion and answer any questions you may have about the sport.