I think it's on par with deleting somebody's Steam account .. and I will rage so bad if that ever happened to my account . 'Cuz not only did he lose the game itself, he lost friends, he wasted money and one of his hobbies are completely ruined now ...

But I guess there's a difference... he was clearly addicted to WoW, so I can sympathize with what the girlfriend did. Just don't do it to me :P I'm content with my addiction, and I have time management