Perfectly open communities always go sour. You need filters. Every functional community has them. And that’s where machine learning comes in... If you can detect trolls, you can protect the people they’re trolling by muting or putting a warning over the trolls’ posts... Twitter... already have a way of screening out porn. Why don’t they do the sam…

Berners-Lee suggested a simple rethink in how social networks and human nature work together could help curtail negative behaviour... "we have responsibility to think how to build systems that tend to produce constructive criticism and harmony as opposed to negativity and bullying."