I also sense the slippery slope present, but my understanding is that many countries have beach-specific laws without sliding into "no private property," so the

I also sense the slippery slope present, but my understanding is that many countries have beach-specific laws without sliding into "no private property," so the evidence is such that the slippery slope does not exist. As for parks, the USA has sorted that already with the national and state park system. Sometimes those get huge land donations from private citizens as well. Buuuut personally, I am of the "abolish private property" mindset anyway, I think that's way out of scope for here though. It's for the same reasons I've listed previously.