Well no fucking shit it's addictive -- anything that is that fun will be. Just as addictive as playing WoW (actually a bit less) or TV or soda. Anything you view as a fun recreational activity will turn in to a habit.

But it's not like you can't stop. I haven't smoked for 4 days after smoking every day for 2 months. Why? Haven't managed to get any. But I'm not going crazy, or going through withdrawals. I wish I had some weed, but it doesn't kill me.

I don't think weed is a gateway drug. I don't want to do any more drugs than I did before I started, and I doubt that will change. The guy in the article was just a lazy piece of shit who was looking for an escape. I can say right now that World of Warcraft has and will be a bigger distraction in my life than weed ever will be.