Well this idea in my head would work like this,
reach max level > gear up > kill players from your own and other villages > build up notorious/infamous level > go full rogue [bad side]
+ pros of mercenaries/rogues +
.Bounties for gold, Similarly to hitman
.Increased reputation with higher rank clans such as Akatsuki [but i dont know if akatsuki will be allowed for normal players thats on you]
.Special pve missions casue you are exiled from village
.Can learn better set of skills [will impact the gameplay for end game casue this clan would be focused mostly around pvp]
.Can get special gear trough achievements in pvp [kills,etc.]
- cons of mercenaries/rogues -
.Hostile to npc's in main citys [that would mean a special spawn]
.Can be arrested [possible jail time]
.Not everyone can join [cause of the abuse to low level players, probably gotta have some rp skills]
.Mercenaries groups can attack each other for possible loot?
there you go. When i finished this i saw that there would be a lot of programing problems with it, seems complicated a bit