Hey, I'm playing on a Pre-TBC server and I found after a MC raid out, you can attack your own faction
1.Go to Burning Steppes
2.Go to Altar of Storms (North-west)
3.Near the Altar is a camp with a vendor
4.Buy Shadowy Potion (3 Pots/6Gold)
5.Go to your own faction (PVP HAS TO BE ACTIVATED ON BOTH)
6.Attack and kill :>
Sometimes you can't attack your opponent faction anymore and if you're going to die, just putt the buff off.
Greets