I used search, didn't see anything like this, sorry if I missed it.
I think palisades and brick walls(though I've never seen this problem with bw) should only be buildable on claims. I walk/boat around alot and see huge palisades with tiny little claims either in the middle or on the gate, I've seen 1 palisade thats a bit larger than 1 and a half grids wide and almost 2 grids high on the minimap, with a claim of about 15 by 20 covering the gate. maybe its just me but I think its absurd.
this does 3 things that I see as improvements to the game:
1)stops noobs from starting and being locked in some huge palisade unable to actually play the game(yes it happens).
2)stops the huge palisades from blocking off an area with good resources when it can't be claimed.
3)stops people from being able to spawn inside someone's walls to grief them.