On my family’s farm, the whole place was posted: “no trespassing/no hunting” yet we’d have people out in a pasture trying to pet farm animals or horses or find deer stands and trash (mostly beer cans in the woods), or people who would help themselves to our raspberries/apples etc., not to mention the amount of trash we’d find and clean up along our road frontage. I can’t believe how much worse it would be if people felt entitled to be there.
I’m generally aligned with principle of right to roam, but I think it’d be a nightmare in practice. + I can’t even think about the associated liability when some person gets kicked by horse or gets shocked by an electrical fence etc.