Here's an unfortunate World of Warcraft mention in the news: a man has been arrested and charged with all sorts of terrible things for having a relationship with a 14-year-old girl that he originally met in Azeroth. Daniel Joseph Czelusniak is 23 and from North Royalton, Ohio, and is being held by Pennsylvania State Police after having a relationship with the girl last year, meeting at a hotel and her house. He originally met her four years ago (when she was 10 but apparently claimed she was 14) while they were both playing World of Warcraft.
Of course, this is hardly the game's fault: parents of young children need to closely supervise their activity online while they're doing anything, be it browsing the Internet or fighting dragons in Northrend. WoW itself is rated T by the ESRB, which means no children under the age of 13 should really be playing it without parental supervision anyway, and the added online component of the game should be even more of a red flag for anyone overseeing younger children. This is a great game (and you couldn't find a nicer community of people who play it), but there are the same dangers in this environment as anywhere else your child might go online.