I like the "lord of the flies" idea of having gankers play with other gankers. I also think Gankers could be beneficial to MMOs by offering these players free subscription to the game if they play as Mobs bosses. For example, After being unwittingly placed in a server with other gankers. If he kills enough of the other gankers he'll be flagged again. Then offered a chance to earn free subscription playing time if he plays as NPC boss allotted to him/her and successfully defeats a certain quantity of players that pass through instanced zone in which the NPC boss lives. Otherwise he/she can continue to pay and only be allowed on a ganking server with other flagged gankers.

This would be like employing a player to be part of the game. This would also increase the quality of PvE in terms not having to rely on A.I. bosses. Basically it would convert PvE into PvP, but it would be very structured and the ganker disguised as a NPC boss could only use the skills given to the boss. Also the communication would be scripted so there would be no clue other than combat that could give you an indication of if the boss is a ganker or NPC.