What it is: With building palisades and brickwalls comes a problem. If you have mutliple gates the keys pile up quickly. I've read Chakravanti's idea, or atleast I think it was his idea, to have key rings. Sounds good and I support it, but could it be possible to also redesignate keys for which door they unlock?
How it works: Using the Lock & Bolts skill you have the ability to quickly recraft a current key to use on another lock for a gate that is on your claimed property. Each key can only unlock 1 door at a time.
How it benefits: Cuts down on how many keys you need. It would allow you to give your friend a key to a gate on short notice. Allow you to rely on less resources. Allow for more flexablity in property managment.
Issues: There is a possibility of abusing this by constructing gates for the purpose of making keys to designate to other gates. However, with the resources and time required to build cornerposts and gates it would make more sense just to make a new key using wrought iron.
Notes: Other things that aren't crucial to the main idea but still relate; the possibility to create a Master Key which has the ability to unlock more than 1 door (could help clear up a cluttered key ring).