Two things I did not understand: 1) Why the hacker instead of sharing all his friends secrets, kill a innocent boy and destroying everyones lives (his included), just did not ask the girl out or maybe show some respect for her and her family when she needed the most? I bet she would like you much more dude. I quite don't understand this type of relationship. That one person to everything wrong to make the other just to call attention.
2) wtf how a boy manage to kill another boy with a lot of students and teachers in the same place? He is a teenager!!! And apparently he is strongly than hulk, because among a lot of people (I think they here trying to save the other boy, right?) he still manage to kill a guy.