Griefers are the Sociopaths of the Virtual World

"Broadly speaking, a griefer is an online version of the spoilsport — someone who takes pleasure in shattering the world of play itself... Griefing, as a term, dates to the late 1990s, when it was used to describe the willfully antisocial behaviors seen in early massively multiplayer games… No longer just an isolated pathology, griefing has developed a full-fledged culture… Amid the complex alchemy of seriousness and play that makes online games so uniquely compelling, the griefer is the one player whose fun depends on finding that elusive edge where online levity starts to take on real-life weight…"