Many of the MMORPGs have the option of having their own home to store their things, just as we have the bank, there could be a system for buying and selling houses and also a base system (headquarters) for guilds, in places with PK on so that guilds can have battles attack or dominate their bases and steal their supplies or guild points ... something like that, this system of houses and quarters general of the navy or pirates, would be really cool, islands and cities where the pk is on as a region of demos, but where guilds can keep their points and battle for enemy territory.