I think we should all care about it frankly because it could happen to any one of us, or our kids. There but for the grace of god and all that. Not that I'm suggesting for one moment any curbs on the freedom of speech or the freedom to hate and bitch to one's heart's content, but perhaps by being aware of the problem and the impact it can have on lives people might consider being a little kinder and a little less judgemental. We have already seen how shit-storms on the internet and in the media can damage those with less robust constitutions. Perhaps coping with social media shaming and online bashing should be taught in schools? And manners and kindness and forgiveness too. 
Whilst not quite what you were suggesting, there is already a law requiring schools to prevent cyber-bullying in the first place, and to dish out punishment to pupils who breach this.
In the only case I am aware of, the school did not appear to care.