I disagree. I was fully addicted to Dark Age of Camelot (DAoC) back in the day. A perfect set of circumstances led to me have bit of time to start playing, and it quickly turned into 8+ hours/day. Anytime I wasn't playing, I was thinking or reading about playing. It ruined some important relationships, and definitely stunted my career (I stayed at an easy job far too long), and impacted me physically (stopped working out, ate like crap, etc...).