Guardian visits online trolls in their home

The Guardian was interested in meeting the most hateful people on Twitter so they went all over the world to meet them and make a 20-minute documentary.

Why do so many people use the internet to harass and threaten people, and stretch the freedom of speech to its limits? Director Kyrre Lien meets a global group of strongly opinionated individuals, who spend their time debating online on the subjects they care most strongly about. Online platforms are their favourite tools to express the opinions that others might find objectionable in language that often offends. Do they behave in the same way when they come offline?