Yo fellow exploiters.
I found out a way to "use your heartstone", without actually triggering the CD, it goes like this.
1. Enter Tol Barad while there's an on-going battle.
2. You will get a popup telling you to get out or get teleported away.
3. Ignore the message and run around in Tol Barad.
4. You will get teleported to where you've set your heartstone!
Now this obviously only works when there's a Tol Barad match taking place.
Is it intended? Probably not, since Tol Barad is like the new Wintergrasp, and it just used to teleport you right outside the battlezone, not to your heartstone location!!