Trolls – Internet slang for people who take to the web to upset people or start arguments – are users who start fights online for their own amusement.

The Canadian psychologists found the same users were also more likely to report trolling as their favourite online activity – sadists, for example, troll because they enjoy it.

“The relationship between sadism and trolling was almost entirely due to the enjoyment they experience while trolling,” said Erin Buckels, lead researcher with the University of Manitoba.

“Everyday sadists do not have a hidden agenda; they simply want to have fun, and trolling is one way that they can have fun online.”

http://globalnews.ca/news/1157137/internet-trolls-are-sadists-and-psychopaths-canadian-study/