This isn't as majestic as the other post I found, but it is a different/ easier method.
For refrence to the (very old) post here is the link.
Get inside dalaran alliance pvp area as horde - MMOwned - World of Warcraft Exploits, Hacks, Bots and Guides
This method I found while just bored, tried a search and came up null / void, so I figured I'd post it. It IS a YouTube video, my rank is just too low for it to Auto-Display.
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Step 1: Follow the directions in the video.
Step 2: Cause mass confusion among the allies by randomly casting AoE and getting them to notice you.
Step 3: Profit? ... uh.. Guild bragging rights?
EDIT: I should mention, that that little spot is like an island, you can walk all over the ledge, but if you jump down, or walk into the doors, you will get teleported out and get the *stun* effect, considering this is so easy to do, perhaps there could be even better parts to this.
Have fun! :wave: