[Grossenschwamm]

It's a habit forming behavior. It starts off with just a little at a time, but eventually, there's a need for longer and more intense sessions of WoW. Only people with an extremely strong sense of will can shake themselves from the game. Why do you think so many people still play it?
And really, if you just take the subscription fees, it's making Blizzard the wealthiest drug dealer on the planet.