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.
That's fair, and to be clear I'm not entirely dismissing the issues related to binge Internet use. I do think this can be a very real problem that has very real consequences. I'm mostly unable to accept the alcohol comparison.
Some alcoholics are genetically predisposed to addiction and some are just using it to cope with something traumatic. Some basement dwellers (predisposed) gravitate towards depraved social forums and some well adjusted people are radicalized by political memes on Facebook.