Because I find this sort of thing interesting. The "Hacker" ideal at work.
"A deadly virtual plague has broken out in the online game World of Warcraft."
"In the last week, (WOW creators Blizzard) added the Zul'Gurub dungeon which gave players a chance to confront and kill the fearsome Hakkar - the god of Blood.
In his death throes Hakkar hits foes with a "corrupted blood" infection that can instantly kill weaker characters.
The infection was only supposed to affect those in the immediate vicinity of Hakkar's corpse but some players found a way to transfer it to other areas of the game by infecting an in-game virtual pet with it.
This pet was then unleashed in the orc capital city of Ogrimmar and proved hugely effective as the Corrupted Blood plague spread from player to player.
Although computer controlled characters did not contract the plague, they are said to have acted as "carriers" and infected player-controlled characters they encountered."
"Many online discussion sites were buzzing with reports from the disaster zones with some describing seeing "hundreds" of bodies lying in the virtual streets of the online towns and cities.
"The debate amongst players now is if it really was intentional although due to the effects of the problem it seems unlikely," Paul Younger, an editor on the unofficial worldofwarcraft.net site, told the BBC News website.
"It's giving players something to talk about and could possibly be considered the first proper 'world event'", he said.
Luckily the death of a character in World of Warcraft is not final so all those killed were soon resurrected."