Mom is stupid. My kids play any games for more than a few hours I force them to turn it off.
They have to eat, drink, and play actively as well. I'll likely let them go back hours later though, at night.
Parents are too easy to forget and let them be quiet than to force them to do what is right for a balanced life.
This is also why there is only one TV in our house. Forces limitations as all members of family adjust game/TV time appropriately. I would go down to one PC as well, but there is too much school and other work that gets done on it.