Originally Posted by
Skapocalypse
This isn't really an exploit, more just the same thing as a bunch of people standing around a mailbox, so no one can click it.
A more entertaining way would be this:
First, you need to be a mage, next:
Go to whichever portal area you want in shatt, ally/horde, and simply open a bunch of portals to horde cities over them. They'll remain on top and will make it so no one can click the portal. It takes a few tries, but after an attempt or two, you'll be able to get the portal exactly inside the port to, say, Ironforge.
When someone goes over to the Ironforge portal, they will be unable to click the portal, as they aren't in your group. Your mage portal overlays the Shattrath portal, staying on top.