One of the biggest elements that any MMO has to deal with is player vs. player combat. How do you balance the needs of players who want to fight with other players against those who'd prefer to be able to play the game without having to worry about being murdered by players who only live to give others grief? Many MMOs answer this question by simply disallowing it outside of specially designated "PvP zones". But what if player combat could be allowed anytime, anywhere, and not only would it be properly balanced and fun for everyone, but would become one of the primary gameplay elements as you got into higher levels?