I have to disagree that internet addiction is not something without highly negative social connotations. There is a significant number of people who fall into poor social circumstances via too much exposure to internet. There are a lot of internet communities out there that amplify deviant and antisocial behavior in people who spend way too much time on the internet. I agree that it's a different beast than a substance addiction, but there's no way you can simply dismiss binge internet user issues. Though my point may seem anecdotal, a lot of people have friends who were a lot better socially adjusted before they started letting the internet change their perspective and priorities.