With good reason. Some of those looked mighty close to undercutting people, clipping knees, and there's no place in hockey for crushing someone into the boards when they're 4-6 feet away from the side- especially the bench. That's asking for some serious head/neck/face injuries. Why don't we see them anymore? Because we now know that hits like that lead to PERMANENT and DETERIORATING brain disorders.
I get as pumped up as the next guy when I see a crushing hit, but you know what? That's not my brother/father/friend who, thirty years from now, will have a hard time writing his name or remembering mine because of hits like that.