I have to agree with rsvman here.
I coach HS boys basketball, and let me tell you, kids loose their minds when competing. They do things that they would normally never do, and sometimes don't even remember doing it. Most of the time these types of things are not premeditated, but are just a reaction.
I would bet the first incident was addressed, and a warning given. The second time I'm sure there was some sort of in house punishment delivered, like conditioning or something as a reminder. Third time suspension, in Allens case 1 game. If there is a fourth he will be gone. The media was acting like he was gouging eyeballs or punching people in the testicles (things football players get away with all the time mind you.) They were wanting a big reaction from Coach K so they could get more headlines. He didn't take the bait. I like that.
Some kids, especially the super competitive ones, don't think and just react. This guys reaction to getting beat is to stick a leg out. Dirty play, but I have seen way worse.
I coached a kid last year, a senior in HS, that was kicked off the team during the playoffs. He was our point guard and our best player. He had issues all year of doing dirty cheap stuff to kids. Some he was called on by the officials and some he got away with during the game. He slammed kids to the ground on rebounds, pushed, shoved, elbowed, punched in the nuts, and the last thing that was the nail in the coffin was he BIT a kid at the end of the game.
He was in denial of doing most of the stuff we had video evidence of him doing. We did in house punishments, he was suspended from multiple games, parent meetings, you name it. Even suggested counseling. He would be better until things weren't going his teams way. Then the crazy would come out.
This kid was a normal well liked kid by his peers and teachers. But he absolutely lost his mind at times during competition. When his head was right he was really good. He did football dirty plays that no one can see from the stands in football, on a basketball court were everyone could see it.