I find it sad that the art of trolling has been reduced to encompass all forms of internet abuse.
The term trolling is borrowed from fishing, where it refers to a form of luring fish. On the internet, few people can do it well and if you can't do it well, you're just an arsehole.
This image sums it up pretty well, there's a blog post to go with it.
Warning: The opinions above are those of an anonymous individual on the internet. They are opinions, unless they're facts. They may be ill-informed, out of touch with reality or just plain stupid. They may contain traces of irony. If reading these opinions causes you to be become outraged or you start displaying the symptoms of outrage, stop reading them immediately. If symptoms persist, consult a psychiatrist.