Gaming addiction

My nephew is really addicted to gaming already. He starts playing at seven in the evening (just after he's done with the dinner) and stops when his mom does not stop stopping him anymore... that's maybe around two in the morning. Even when they have classes the following day, they could not stop him from playing. He does not care about his home works. He does not care about his grades. All he cares about is the enjoyment he gets when playing computer games.

Recently, my sister told me that the the boy searched for game torrents and he's up to some new games on the Internet again. I’m not sure how he became this addicted to gaming considering that he's only less than ten years old.

I told my sister to limit his son's access to the computer. Not only does it affect his school performance... it also worsens his health. He became underweight since he started this gaming thing. I told her to change the computer's password or block the gaming sites so that he can only use the Internet to do his assignments at school.

I hope that it's not too late yet to impose on my nephew some rules regarding this. I read some cases wherein kids need medical treatment already for having gaming or internet or computer addiction. I feel sad every time I think about this. I wish my sister will be stronger this time.