Searched and didn't find anything similar. Also I'm not sure if this is a real exploit, but it was the best place to post it.
How to get 4 marks in WG:
We (the alliance) was defending WG, and the horde was almost inside WG fortress. At 10 seconds left they destroyed our last gate, but they didnt manage to click the titan relic before a msg said:
The Alliance has Defended Wintergrasp!.
But ~one second after it said The Horde has captured Wintergrasp!.
It was of course bad to lose, but I got 4 marks! Some of the guys that was close to me also got 4 marks. Guess this works both ways, and in that case it's just to wait untill the defenders have won to click the relic, and you will get 4 marks.
I know about the "remove names" thingy, and have removed all names except one, just to proof that we got 4 marks (it is not my name =P ). Also, it is not client side, cuz I did go from 2 to 6 marks.
I assure you that this is no photoshop. Don't even got photoshop.