I'd call you a troll, but that would overstating the case, and it's possible you're something stupider, like a republican.
Yes. Any activity performed in such a way that it inhibits a person or makes them unhappy can become a disorder, a very real disorder. The exact behaviour is not relevant. It could be counting your steps - people do it obssessively and it gets in the way of their lives and makes their lives difficult - then its a disorder.
2. Or is it a red herring masking depression and escapism?
It can be. It can also be an OCD of its own.
3. And to make things more indeterminate, Isn't more and more time online the inevitable future?
Depends on how you determine "the online". If your fridge is phoning home every time you open the freezer, then you are online, but you don't notice. You drive down the street and your cellphone is tracking your moves and phoning home. You are online. Gluing yourself to a chair to spend all day on Facebook is not the only way to be online, so while "more online time" may seem inevitable, how it is expressed in social practice is something else altogether.
If A = B and B = C, then A = C, except where void or prohibited by law. -- Roy Santoro