In Internet terminology, a troll is someone who comes into an established community such as an online discussion forum, and posts inflammatory, rude or offensive messages designed intentionally to annoy and antagonize the existing members or disrupt the flow of discussion...The contemporary use of the term first appeared on Usenet groups in the late 1980s. It is widely thought to be a contraction of the phrase "trolling for suckers," itself derived from the sport fishing technique of trolling. The latter can be compared with trawling...The word likely gained currency because of its apt second meaning, drawn from the "trolls", which are portrayed in Scandinavian folklore, and children's tales, as often ugly, obnoxious creatures that are bent on wickedness and mischief. The image of the troll under the bridge in the "Three Billy Goats Gruff" emphasizes the troll's negative reaction to outsiders intruding on its physical environment, particularly those who intend to graze in its domain without permission.