I don't think there is such a thing. Sure, we're becoming more connected, and the usual suspects (mostly those afraid of change) decry this a bad thing. A favorite (techy) comic of mine, XKCD, made the quote that "Those who worry about societal decline do more damage than societal decline ever did" - and truer words have never been spoken.
As to the second part.. of course. Anything can become an addiction, whether it be technology, food, sex.. whatever. Those who work in this field probably border on addiction or obsession (tech for tech's sake), but there is such a thing as a healthy addiction. If it enhances your life and doesn't impact it or others' negatively, it can't possibly be bad.