"Trolling", as it has been called, is one of the main internet hazards. One that is cruel and anarchic. The effects of "trolling" soon become known to those who speak out on topics people feel passionate about. Often vicious and evil-minded, a "troll" can attack even those who raise no contentious topic, but who attract disturbed comment, whether verbal or pictorial.
Here is a commonly seen, rather chilling representation of the internet "troll".
read more: Internet Trolling: A Playground For The Cruel and Unusual