Do you know of any incidents where teens or college students have behaved viciously?

One I remember was when this teen girl in high school made fun of a dead brother of a male peer. It ended with the girl getting a beating and turning her it into a vegetative state. To me the girl was the vicious one.
(Although I don’t like the idea of paralyzed girl and I don’t encourage violence but the girl had some sort of physical retribution coming in my opinion)

Then there is the famous case from the east Coast U.S where in the first year of college a Homosexual teen committed suicide after two of his peers from his dorm had opened up a web-cam connection in his room and could see his associations with another male and decided to spread the news.