Monitor Children's Exposure to Game Consoles

Now that we have started homeschooling, it is now more than ever that I am convinced that children should not be exposed to too much game consoles.  I am not a game console hater, we actually have one at home.  I just happen to believe that there should be moderation to everything.  XBOX, Wii, PS3 players should be played mostly by adults and if children should at all be allowed to play, there should be a limit.