I don't know the name but I know it's about these outcast goth kids that find a way to get revenge by infecting the other kids with a spider poison and then the kids that they give the poison to see a dead jock that hung himself. Then the outcast girl gets infected but doesn't die because another girl finds it.
Sorry if its not much but I really want to find it.

Hangman's Curse (http://www.imdb.com/title/tt0342508/)