Are you kidding me? You think this is an exploit! It's been used for seasons to trick people into running down cliffs, you can do the macro with any series of numbers and letters, it's not difficult.
ALSO! I'd like to not that it doesn't make you invincible at all! All the attacker has to do is find where your client side location is and woop your ass, because you;re already frozen.
IMO it's pointless, but if you're against a keyboard turner. i deem it worthy.