It's a scientific FACT: Online comment trolls are SADISTS

The biggest wastes of bandwidth online!

A group of Canadian researchers has given the imprimatur of social-science recognition to a fact that many of us who spend time in internet comment forums have suspected: there's a strong correlation between online trolling and sadism.
"Both trolls and sadists feel sadistic glee at the distress of others. Sadists just want to have fun ... and the Internet is their playground!" write Erin Buckels, Paul Trapnell, and Delroy Paulhus of the Universities of Manitoba, Winnipeg, and British Columbia, respectively, in a paper to be published in the journal Personality and Individual Differences.
(theregister)