Holywood you do have valid opinions often but you are being a big time homer here.
Spearing someone in the back with a game already decided and the losing team basically trying to run out the clock, is not part of a rough sport. It is part of being an idiot. Deliberately going after someone's head is bush league.
By calling the plays I described "subjective" you are essentially saying I might be a liar or a moron. You are entitled to your opinion, but you're wrong.
At last year's SB, after a long TD pass late in the game Delhomme was running down the field to celebrate with his receiver. He was probably running 80% of full speed. As JD ran by, Harrson tried to lay a shoulder/elbow into him (shoulder/elbow because it was an awkward motion). He hit him, but did not injure him. He may have injured himself on the play.