Hey, I was wondering if there is an area-based PvP plugin with which you can define areas of pvp and areas of non-pvp. If it does not yet exist, maybe this could be an idea for a new plugin?
But first, in the .properties in your main directory, turn pvp-enabled=true, then while in game make the flag for __GLOBAL__ PvP=deny. The __GLOBAL__ is a preset region indicating the whole map. Then, make a region were you want PvP enabled, and set the flag to PvP=Allow. All without another plugin.