Overall, the authors found that the relationship between sadism and trolling was the strongest, and that indeed, sadists appear to troll because they find it pleasurable. “Both trolls and sadists feel sadistic glee at the distress of others,” they wrote. “Sadists just want to have fun … and the Internet is their playground!”
So the basic take away I get from this is that chronic internet trolls are pretty much sadistic psychos. (Seems like an apt description of some of the rabid anti-Mormon trolls I have encountered over the years.)
Anyhow, three cheers for active moderation of comment sections! We may not make trolls cease to exist, but we can at least keep these psycho sadists out of our own blog comment sections with a little effort.