PSA: Giving promotion privilages to someone in your FC gives them all privilages

[alimdia]

Two more additions:

Anyone with the permission "rank settings" can give themselves permissions they didn't previously have.

Anyone with the permission "purchase/relinquish land" and "hall construction/removal" can demolish the FC house, relinquish the plot and buy the plot as a personal to themselves, without ever asking for FC master confirmation.

So as a FC master you should remove these permissions from everyone as they are not used very often: Rank Settings, Purchase/Relinquish Land, Hall Construction/Removal, Workshop Construction/Removal, Airship Registration/Dismantling, if anyone needs to mess with any of those settings they can wait until you're online.

[Kosmos992k]

Two more additions:

Anyone with the permission "rank settings" can give themselves ranks they didn't previously have.

Anyone with the permission "purchase/relinquish land" and "hall construction/removal" can demolish the FC house, relinquish the plot and buy the plot as a personal to themselves, without ever asking for FC master confirmation.

So as a FC master you should remove these permissions from everyone as they are not used very often: Rank Settings, Purchase/Relinquish Land, Hall Construction/Removal, Workshop Construction/Removal, Airship Registration/Dismantling, if anyone needs to mess with any of those settings they can wait until you're online.

Remove the ability to withdraw gil from the bank as well unless you want to risk that being drained. Basically only the FC master should have any 'sensitive' abilities within the FC, otherwise it's possible for someone to maliciously exploit the incredibly flawed system to asset strip your FC out from under you.

IIRC you can't promote yourself higher than yourself but you can promote others higher than you.

And they cant promote to the ownership level, but they could promote to a level that is so strong that it basically does everything that is important (and entirely destroy the FC).

Yes, so you could create an Alt, and promote your Alt above yourself, thus completely compromising the system.