In the comments, I suggested Land Value Tax as a free market solution to the question of whether the State should be allowed to permit ramblers access to coastal paths even where they cross somebody's land.
A tax is a "free market solution" now, is it?
Fuck me, I hadn't realised. You see, I thought that taxes were a distortion of the free market since it is a cost imposed upon free transactions between two entities, thus rendering that transaction... well... not free. I'm happy to be corrected by Mark.