Troll (noun)

Main article: Trolling A troll is someone who cleverly upsets people, confuses people, pranks people, messes with people, or deceives people online. Trolls also like to make random or controversial statements in a forum to throw off the discussion of the subject and start an argument or flame war. Trolls lurk in online games, message boards, forums, chatrooms, comments, and just about anything else that can be online. One of the common acts of trolls is tricking people into doing something online.