Okay, but...

So, if video games aren't an addiction, then what do you call it when you've been sitting at your computer for twelve hours and you wonder why you're hungry when you've been typing "eat" all day?

What do you call it when you've been sitting at your computer for twelve hours and you wonder why you're thirsty when you've been typing "drink" all day?

What do you call it when you've been playing on a MUD for so long that you dream in text? Or when you've been playing Half-Life for so long that you dream that you're Gordon Freeman?

I'm not a mental health professional, so I'm not exactly going to argue with their judgement, but it seems to me that something would have to be going on in someone's brain when those things happen. (Yes, all those things happened to me.)