Get traumatized due to poor choices and naive youthfulness (and craving for unhealthy attention.) Start new life. Enter new school. Join cheerleading squad, meet a few people. Apparently still have an unhealthy need for attention (I mean, didn't she learn after the boob ordeal?); decide to shag one of your friends' boyfriends. Friends get pissed at you, the girl with the boyfriend gets real mad and tries to beat you up. Understandable, wrong, not bullying. Get zoned out and feel alone obviously, which doesn't mix with your still unhealthy need for attention. Mix that in with bullying stalker, of course, but... Well, then she posted a video for attention...
Look, if she hadn't made these poor decisions based upon her cravings for unhealthy attention, she might actually have gotten support from her friends rather than the problems that erupted instead. Particularly boinking your friend's boyfriend in an established clique of cheerleaders isn't going to fix your world even though you might temporarily feel better about yourself. I'm not going to talk about flashing people online.
Resisting bullying against you is about managing your resources, and her of doing it was to draw unhealthy temporary attention towards her. Which she did in the first place with the flashing. Remove the bullying part and you have a girl feeling a need to draw unhealthy temporary attention towards her. It's still unhealthy, it'll also often lead to social isolation. Her resources should be in her parents and friends at the very least. Her friends, she screwed them up herselves, her parents... Well, I think that it's there it went wrong, if I had to make a personal guess on the root of her attention issues.
She's a good example for stopping cyberbullying before she moved. After that, I simply don't think her parents did a good enough job of having her feel comfortable and secure. edit: and if they couldn't have done that, I'm not sure they had done a good enough job to establish themselves as a source of trust and security in the first place.
Her attention issues would be the central problem. Not something that's necessarily her fault, but it's modifiable behavior which can be circumvented and changed with subsidized programs.
Don't get me wrong, I dislike bullying, and if she was never bullied, she had probably still been alive. So stop bullying etc. I do, however, still think that she would still have been really miserable as she apparently did not cope well with distinguishing good attention from bad attention, leading to some really bad choices. And helping her do that through any means would be governmental resources better spent. If anything, she would not have been bullied to begin with, never showing her tats.