The carnage in World of Warcraft
They've created an unstoppable character that can destroy all others, including those controlled by the game. Ironically, the TV show South Park parodied such a situation in an episode titled Make Love, Not Warcraft six years ago.
Unfortunately the real life fix to this escapade is far less entertaining than that of the episode; the game's creator, Activision Blizzard, simply released a software patch to prevent repeats.
"This exploit has already been hot-fixed, so it should not be repeatable," Blizzard said in an online forum.
According to the BBC, more than 10 million gamers play World of Warcraft.
Olivia Grace, who contributes to WoW insider as an editor believes "it was a significant hack."
"They discovered a method to roll a level-one [beginner] character, which ran to the major cities.
"We don't know exactly what they did, but somehow they were able to kill every single player's character in that city and every single computer controlled character - and they were doing this repeatedly."
Grace believes the same hackers have attacked WoW before, but to a lesser extent.