“Ultimately, the allure of trolling may be too strong for sadists, who presumably have limited opportunities to express their sadistic interests in a socially-desirable manner.”
So is malicious trolling online an expression done in 'a socially-desirable manner'? Who desires to be trolled? Or are sadists less likely to troll in real life because it is less desirable for them? If the writer is arguing for the second, I'd have to disagree. I have known real life malicious trolls, and I think they quite enjoy seeing the faces of their victims after their fuckery. They may be doing the trolling behind the scenes, but trolls love a good response,. Actually in real life, I'd call them borderlines. Maybe the scientists should study the subjects further to see if trolling online is therapeutic and limits damage in the real world. Then I'd almost be okay with it.
On the other side, there are benign trolls who are in it for the lolz, who can be quite funny and who fall into jokester or prankster category.