I was inspired by the time travel talk from last Friday's The Queue. If you were able to kill Arthas while doing the Culling of Stratholme; you would prevent him from becoming The Lich King, but would cause a much faster spread of the plague. It reminded me of this great piece of short fiction, where going back in time to kill Hitler prevents time travel from becoming possible and is therefore strictly forbidden.
I'd like to go back in time and help Mankrik's Wife escape her violent and lonely death. Do we really need another reason to slaughter those nasty boar humanoids? Besides, I bet she had some really great quests that we missed out on.
If you could go back in WoW time and change something, what would it be? What do you think the ramifications of your change would be?