Apparently he barely got away with this one:
http://www.nfl.com/teams/story/TEN/9435285
As for hockey, the fist-fighting is cool as both parties generally engage. And I think on some of the horrible cheap shots in hockey (stick to the face type stuff) they have levied criminal charges.
I'm not a big football fan, but I like the game. Fist-fights, shoving, pushing, etc is all part of the game IMO. The face-stomping is seriously messed up. Why let him ever play again?