Well, according to this item, yes.
(Is anyone surprised?)

From the New York Times:

There you are, peacefully reading an article or watching a video on the Internet. You finish, find it thought-provoking, and scroll down to the comments section to see what other people thought. And there, lurking among dozens of well-intentioned opinions, is a troll.

“How much longer is the media going to milk this beyond tired story?” “These guys are frauds.” “Your idiocy is disturbing.” “We’re just trying to make the world a better place one brainwashed, ignorant idiot at a time.” These are the trollish comments, all from anonymous sources, that you could have found after reading a CNN article on the rescue of the Chilean miners.

Trolling, defined as the act of posting inflammatory, derogatory or provocative messages in public forums, is a problem as old as the Internet itself, although its roots go much farther back. Even in the fourth century B.C., Plato touched upon the subject of anonymity and morality in his parable of the ring of Gyges.

That mythical ring gave its owner the power of invisibility, and Plato observed that even a habitually just man who possessed such a ring would become a thief, knowing that he couldn’t be caught. Morality, Plato argues, comes from full disclosure; without accountability for our actions we would all behave unjustly.

This certainly seems to be true for the anonymous trolls today. After Alexis Pilkington, a 17-year-old Long Island girl, committed suicide earlier this year, trolls descended on her online tribute page to post pictures of nooses, references to hangings and other hateful comments. A better-known example involves Nicole Catsouras, an 18-year-old who died in a car crash in California in 2006. Photographs of her badly disfigured body were posted on the Internet, where anonymous trolls set up fake tribute pages and in some cases e-mailed the photos to her parents with subject lines like “Hey, Daddy, I’m still alive.”

Psychological research has proven again and again that anonymity increases unethical behavior. Road rage bubbles up in the relative anonymity of one’s car. And in the online world, which can offer total anonymity, the effect is even more pronounced. People — even ordinary, good people — often change their behavior in radical ways. There’s even a term for it: the online disinhibition effect.

Read more.