It could seem attractive to try to teach computers to detect harassment, threats and abusive language. But it's much more difficult than it might appear.
Companies and governments should do more to prevent 'revenge porn' without asking potential victims to send their nude photos to Facebook.
MPs come in for a lot of abuse online. But who are the haters and is the media partly to blame for the way it reports politics?
Faced with the prospect of constant online attack, why would anyone want to get into politics?
The online abuse of journalists is increasingly leading to self-censorship and websites abandoning the comment function altogether