Multiboxing ruining A.V for the Gold Quest

There is a repeatable quest that awards 20 gold, so greedy players are ruining the game for everyone else by joining Alterac Valley, capping a graveyard, and then leaving, splitting the main group into the players who have reached Galv Point and the new one inside the cave.

this makes Horde players win Alterac Valley over and over again.

And the problem is the greedy multiboxer that are joining 5 in 5

So please I'm begging you as a PVP player, please disable mercenary mode and pre-made groups from random battlgrounds!