Zoe Zivago

In Internet slang, a troll is someone who posts inflammatory, extraneous, or off-topic messages in an online community, such as an online discussion forum, chat room or blog, with the primary intent of provoking other users into an emotional response or of otherwise disrupting normal on-topic discussion. Trolls can be costly in several ways. A troll will disrupt the discussion on a newsgroup, disseminate bad advice, and damage the feeling of trust in the newsgroup community