I think in general this ends up being the same market failure the original post alluded to - there's tail risk of someone actually finding something, declaring

I think in general this ends up being the same market failure the original post alluded to - there's tail risk of someone actually finding something, declaring your property a landmark/historical site which severely limits the possible use thus negatively impacts the value of your property... with zero compensation to you. Rational response there should be F NO.