The Guardian brings us news of research, confirming what we all already know:
Buckels and colleagues asked about the participants’ internet behavior, including how frequently they comment on blogs and forums. They also gauged how the subjects commented, asking whether they preferred debating, chatting, making friends, or trolling. Of the 418 participants, 59% said that they actively comment on websites. Among those, nearly a tenth admitted that their favorite activity was trolling other users.
Scores on the Dark Tetrad personality test revealed that trolls are, by far, more likely to have narcissistic, Machiavellian, psychopathic, and sadistic personality traits.