Chinese kids are forced to play World of Warcraft 12 hours per day to earn virtual money for Gold Farming companies and gangs.

It is known for a while that there companies in China and other countries that pay workers to play WOW to generate virtual money which in turn is then sold to gamers around the world who want to jump-start their game character.

A Chinese TV station followed kids with a hidden camera who fell for the cool proposition to get paid for playing video games.
It is borderline slavery what these kids have to endure. 12 hour WOW every day, almost no pay and shitty food. This is a new form of child labor and nobody should actually buy from gold farmers. See the video report here (German).
Story first seen on Golem (German).
See also background on Gold farmers on Wikipedia.