Internet trolls are something we all need to get use to unfortunately. The more you know, the less they will get to you. Here is an article about them.
As a lurker in various forums, I can spot a troll quickly. It's kinda sad when you see unsuspecting people who respond to them but at the same time, it kinda keeps me amused. You know, like a train wreck in slow motion and you're wondering exactly when the disaster will end.
http://ellelapraim.com/what-is-a-trol...