From what I've read so far, what Phoebe went through far exceeded mere name calling. I've read quotes by students (and their parents) in the media and on Facebook, and it seems she was something of a social pariah at school. Sure, just about everyone has to deal with unkindness at some point during their academic career, but few have to deal with extreme social ostracism and bullying to the point of harassment. What separates bullying from mere name calling is the relentless nature of bullying. As I've mentioned in a previous post, I've seen it suggested by students that she was "constantly tormented," and IMO, this could have interfered with her right to an education.
If someone at your place of employment relentlessly called you by sexually suggestive names, would you view this as common name calling or as sexual harassment? Chances are that you would try to get the offending party fired. I sure would! And I don't know about you, but I would seriously consider bringing criminal charges against my offender as well. The things that Phoebe is said to have endured would have never been tolerated by adults in the workplace, so why should it be acceptable against a child in a school?
Harassment and physical assault are illegal, so even if she hadn't killed herself, the accused would have still been guilty of engaging in illegal behavior had they harassed and/or physically assaulted her. Perhaps they wouldn't have been criminally charged were she still alive, but we'll never know, will we?