Most people consider WoW just a game, but what about the people who spend too much time playing? Do they consider in their mind that this is their life or do they know they difference? Even the company has inserted a "Tip" on the loading screen saying "Take everything in moderation even WoW"
In my view, it is a game but when there are very few things to occupy free time it's fun to chat and play with people around the world.
Some many get carried away even believe that they are the characters they have created.