[Satrek2000]

I know that using a boat as a house is just stupid nowadays, but the way I got it that's what part of the mentioned ideas are about.
I know that boats can be destroyed, but so can marking runes but they're still a bugger at sea. Maybe it could be made such that ships with nobody aboard don't block? Just another idea. This way, blocking in times of war would work, but not just to annoy.
To allow everyone just a single boat might work, but what if your baot is stuck somewhere on another island? You won't be able to build a new one... also, similar to owning a house, there's nothing to give a group full access to it, which would make even more sense for a boat than for a house... GK has families and other groups, which could share boats, have wandering pirate groups or whatever, that'd be tricky with this kind of ownership, too.