I have never played or installed WoW.
I logged onto xfire from someone else's computer once, and they had WoW. Thats probably why it shows up on my list.
I have never played it myself, though I have watched other's play it. And it looked boring as hell.
There are actually a couple games in the "< 1 hour" category that I don't have. even one in the "1 hour" category.