This is an unusual way to implement the private chamber imo, I mean you can't kick that person if they own a room in the FC then this means when someone join your FC to harass the members but you can't kick them out because they already built a room in the FC to prevent themselves from getting kicked. Now its permission is a very important thing to consider similarly to the coffer.

Wouldn't it be much better if they make it so the room moves with the player when they leave/get kicked from the FC and then only able to access the room again if they rejoin a FC? Or retain the room but considered "abandoned" until the FC master assigns someone in FC to replace the ownership of the room. Any ways without locking members in that FC.