Writing a book - what are some REALLY bad (but unusual) things that could hapen to her over fb? (preferably)?

So shes upset because her family arent nice and dont understand her and shes bullied at school but she pretends to be happy all the time, but then her only friend(who she never gets to see) starts to suspect somethings up and something bad is happening to her and it sort of has to be online because I've written a bit about it being on fb...doesnt HAVE to be though. Any ideas on what really bad could have happened to her on facebook thats not cyberbullying?