Funny. I spent many entire weekends and just about every storm day playing D&D. Went through the whole 'parent thinking I was addicted' thing too. But honestly, when you grow up in a small fishing & lumber mill town, what else was there to do?
In hind sight, it kept us out of a lot of trouble because our alternative to D&D on a Friday night was always beer. At least we alternated hobbies instead of just beer.
In a way, I still play the evolution of D&D a few hours a week when I fire up Vanguard, an adults answer to World of Warcraft.
With great power comes Awesome irresponsibility.