Very disturbing *Spoilers*

When I saw this, I found it very disturbing. I hated those bullies, they were absolutely horrible, and they should have been put in jail! One scene I didn't get, was Kelly was in the locker room, crying, and her friend finds her, and Kelly has marks on her body. Did they cut her? Why didn't she call the police?

She should've called the police after that, or when they chased her into the woods and terrorized her. I hated those two, and wish that they had been arrested. What's everyone else's thoughts on the film?