Sure, play WoW. It will prepare you for life as an upload.
Seriously: I play WoW about 15 hours per week. I find the game to be a most pleasant way to relax, better than, say, TV, which I only watch for 1-2 hours per week.
But the game is designed to “reward” time spent playing (you can find plenty of info on that on the web), and I know that many people do get sucked in and spend countless hours doing mindless, repetitive tasks to get some minor advantage (of which there is a practically inexhaustible list). These are the kind of people who look back with shock and horror on broken relationships, stagnating careers, flabby physiques and quite rightly attribute that on 10′000++ hours over 5+ years playing WoW.
So I think it all comes down to: what will you be giving up to find time to play? If it is TV, lolcats, porn etc—fine. If it is study, exercise, and good company—do not do it.
You know, this seems socially naive to me, in a way characteristic of ideallistic young introverts. People do not usually respond well if you offer to pay for stuff they would otherwise enjoy doing for free, under the right circumstances (such as reciprocal dinner invites).
But I may be wrong, give it a try and report on the results, one of us will probably learn something.