I see both sides of this situation. If I had enough money to buy the private land around public, I would. And I'd keep people out. If I was that rich, I'd also land a helicopter in the other public islands just to annoy the private land owner around it. This happens in the midwest with lakes. The lakes are public, but all the land around the lake is private limiting lake access. As a tax payer, I think it's wrong. It's public land, and should have public access.
What really bothers me, is when a corner of public land touches more public land. It is possible to step over a corner, or two adjoining corners without stepping on private land. As a land owner you own the LAND, not the air above it. So as long as a foot does not step on the private land you are not trespassing, despite what some landowners think.
Actually land owners do own the air directly above the property.
