Ok, this is abit alike my previous thread, but I thought I'd create a new one since I made this discovery now, want to clear things up a bit.
This is a simple yet effective exploit. You pull an aldor mob down to shattrath. He will for some reason not banish you, but whenever someone touches him they'll get insta banished.
You can also have a lot of fun by MCing him if you're a priest - "Banish" will show up on your pet bar!
Vid:
[ame=http://www.youtube.com/watch?v=FF7Yzj4ZqJ0]YouTube - How To: Banish other WoW Players![/ame]