Just looked at the highlight reel on Mike Williams on the front page. If you want to see players intentionally trying to hurt another player, watch the entire 7 minutes of this clip. What you'll notice between Auburn and every other team, is that just about every tackle by an Auburn player had someone coming in hard with the crown of their helmet down and directed right at Mike's head. If he hadn't constantly ducked his head right before the hits, we may not have had him all year.
Compare the Auburn tackles to all the other teams and it is obvious. No doubt they were trying to go for the head and put him out of the game.
And I also remember a couple of times that he was pulled down with an arm around his neck. Seemed very intentionally trying to hurt him. Really frightening..