Hey,
A friend told me that he accepted a quest in dalaran with his horde char and got rep because he accpeted the quest. He cancled the quest an got exaulted with this method. I cant test these method because i ve no lvl 80 horde char but if evryone can comfirme these bug it would be awsome!
You need: a lvl 80 Charakter who didnt any Cata quest. (Maybe a SoR account)
The Quest:
Horde: Make Haste to Orgrimmar! - Quest - World of Warcraft
i think if it works is it only horde.