In China your World of Warcraft session is limited to three hours, by law.

Here in the USA, gaming sessions are - theoretically, at least - limited by choice. Parental choice, in the case of minors. For parents who have a difficult time saying no, a California firm is offering the PC equivalent of a chastity belt (our term, not theirs).

Southern California startup Woog Laboratories today introduced the PC Moderator, a $79.95 parental control device it is marketing as a way to "tackle the problem of computer addiction, particularly among teens."

According to Woog's press release, PC Moderator allows parents to limit the amount of time kids spend online "with less conflict." Unlike filtering and parental control software products, PC Moderator is a hardware solution. The device attaches to a PC's video port (VGA or DVI). Parents then configure the PC Moderator with passwords and time limits for as many as 8 users. When the time limit is up, the device simply blocks the video signal from the PC to the monitor.

As we might imagine, your average WoW addict - and the uber-popular MMO is specifically mentioned by the product's creator - might not take kindly to having his or her picture go black in the middle of an endgame instance. To prevent physical attacks, the PC Moderator is protected by an 18-gauge, stainless steel case.

"With the phenomenal response to World of Warcraft, the world's most popular online game, we're worried that more teens are at risk for computer addiction," said company founder Dr. Kenneth Woog. The device is padlocked to prevent removal.