How could they not foresee this exploit :P
I just finished a tol barad and everytime we got 2 nodes a raid summon was used. It took about 5 tires using it, but eventually we won.
With tons of alliance people having this perk now, I can foresee hordies not owning tb the majority of the time.
I also cant see them banning anyone for using it. I think the entire pvp population would be gone if they did :P
Honestly though its not really an "exploit" by definition, its a creative tho unintended and unwanted use of mechanics. You arent glitching the game in any way or glitching an encounter to lean to your favor, youre just using a spell provided for other intentions that was never limited or thought about use in PvP areas not classified as BGs.
I do like the reply "Its what we're best at..."
haha