It's not easy to admit that you're addicted to something, as it automatically implies weakness and patheticness.
By the way, you could have just deleted warcraft or something, without taking the computer apart - I'd be pretty annoyed if that happened warcraft aside.
When he's moody, try tickling him till he laughs to break his mood, or you could give him "World of Wh0recraft", a porno of Warcraft, that's so unbelievably funny that he'll be laughing in no time. "My clock of zendor is broken will you fix it?""That'll be 5 gold""I have my own way of paying"
Oh dear.