Okay so we all know as of 3.2, flying mounts can be used in Wintergrasp when the main battle is not taking place. Here's where the fun comes in. The controlling team is supposed to have a nice safe domain to buy things with their Wintergrasp marks and stone shards. HA. Not anymore. Bastards.
If your class has range (Boomkin/Mage/Warlock/Hunter/Priest) Etc.
Use your flying mount to land on one of the various bulbs/ ledges /walls of Wintergrasp. There are tons of places but i'll give some examples. Point being, you can ranged attack them with them completely oblivious to your presence and the guards wont do anything to save them
You can usually kill them or have them about to die before they even know whats going on.
Now get off that flying mount and curb stomp the other faction. They won the battle, you win the war