I couldnt see how to change my title in my hunter tricks so i am making a new thread for locks.
I havent tried this in my spot in tanaris but I do know my buddy does this trick with his fel guard in BB with the same results so it should work fine in Gagetzan.
This is the post for hunters just change the word pet for demon.
Go outside of gagetzan on the east side (behind the inn). scroll your view out so you can see over the wall. Find a low player and send pet on him. After the pet kills him it INSTANTLY leaves the area spawns back beside you.
You never enter combat the whole time!
There is a couple spots in the game where you can do this.