So hretsam said he wanted the world to be like the biomes mod, I was thinking also in the fort world, you should be able to have group lot owners (a few owners) so then they can both Kick,ban ect from the lot. I was also thinking with each fort you could have a rank system and in that rank system you could have a sign above an iron door with
[RANK]
Owner
or
[Rank]
Soilder
This will help with stuff like user permissions ect and what they can and can't do with what the fort owners want them to do