I'm fascinated by trolls, mainly because a former friend became one. It's interesting to read about the darkness that resides within these people.

Troll with it:

...the data exposed a quite different reality: internet tossers are just tossers, whether online or in real life.

In other words: the internet isn’t making people rotten, it’s just handing the rotten people a bigger microphone.

Taken together, these studies sketch out a revised model of what online culture does to our discourse. The internet offers toxic people a new outlet for their bile; that bile attracts other toxic people, who amplify it.