After reading this post
, and seeing that False saying that it won't be implemented, I came up with a new PvP idea. Rather than having the owners set certain PvP areas, we can have players be able to turn on PvP in their claims so that they can create their own PvP arenas.
Now don't worry, you won't just stumble into some player's claim and get jumped. There can be an invisible barrier of sorts, that can only be bypassed if you type a command (such as /enterpvp) to make sure you want to enter the area. All items will stay locked to the player upon death.
This can create some very interesting community made PvP mini-games and allow players to experience PvP, something that has long been requested.