Server Gangz
We could have gangs in the server. A gang is a group of players who are addicted to pvp. A gang can get more "gang points" or "Credit" by getting more player kills. Gangs can go to war with each other regardless of location. Gang wars would render a player of a rival gang vulnerable even if they are in a town.
Dunno, other servers have a similar system. Feel free to add on some stuff like gang benefits, ranks etc.