I almost talked about this under the Whose Reality context. My approach for exploring the issue was going to be looking at the negative sides to masquerading as a follow on from discussion on all the positives masquerade can lead to such as allowing shy people to come out of their shells online and be awesome. Well anyways my approach was more or less going to be a long the lines of looking at what leads people to troll, whether it be a release of stress and anger and what allows people to troll online. As opposed to trolls being perfectly normal in person which is a whole big discussion about the lack of inhibitions people have when protected by anonymity online and the lack of human connection and ability to see emotions normally conveyed through things such as facial expressions.
In my actual essay I never actually talked about any of that though, it was already much to long. I guess I don't mind sharing a quote of interest, just because everyone here has been a big help for me. "Society is a masked ball, where everyone hides his real character and reveals it by hiding" ~ Ralph Waldo Emerson (American transcendentalist and essayist)
I hope that's of some use for your studies. I can tell you unpacking all of this and thinking about it has been good for myself. I just might be able to write about trolls in a lot more depth now.