…a collection of trolls, irritating internauts, and assorted internet pests.
Strictly speaking, an internet troll is a sometimes mischievous, sometimes bloody minded, sometimes downright nasty pain in the neck who seeks people out on-line to wind up, flame, get into a row with, take the piss out of or stalk and all this just for the hell of it and to show off to their “friends”, the other trolls. They are mostly harmless, but can still ruin you day if you’re not expecting them. If you know what they’re about, their blow is softened and you can laugh them off for the sad, irritating little people that they really are.
The internet is also rife with other pests, as catalogued here, and it is useful to be aware of them so you can defend yourself, your wits and your sense of humour from them.
I am constantly updating the catalogue, so stick this in your feedreader to get any new trolls and pests of the internet.