I came across this article, which I found interesting:
Internet troll personality study: Machiavellianism, narcissism, psychopathy, sadism.

The article explains that according to research, people who troll online and grief people in online video games possess higher Dark Tetrad (Narcissism, Machiavellianism, psychopathy, and sadism) traits.

I will paste highlights of the article for you guys:

The researchers conducted multiple studies, using samples from Amazon’s Mechanical Turk but also of college students, to try to understand why the act of trolling seems to attract this type of personality. They even constructed their own survey instrument, which they dubbed the Global Assessment of Internet Trolling, or GAIT, containing the following items:

I have sent people to shock websites for the lulz.

I like to troll people in forums or the comments section of websites.

I enjoy griefing other players in multiplayer games.

The more beautiful and pure a thing is, the more satisfying it is to corrupt.

Yes, some people actually say they agree with such statements. And again, doing so was correlated with sadism in its various forms, with psychopathy, and with Machiavellianism. 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!”

As somebody who both trolls and is an avid gamer who griefs people on multiplayer games for time to time, I can relate to this article rather easily.

Thoughts guys?