Ooh! I may know the answer to this one! No armed guards, violence, or threats of violence of any kind. We just build barricades strong enough to keep Roy L. and his land use coveting ilk out. Permanently. Bomb proof even. Completely exclusive.
The deprivations Roy and his motley crew will suffer will still be there, of course, but the only threat of force or violence will be on their parts alone.
Unless, that is, we can call a barricade a "threat" or "initiated force" against anyone who tries to batter their way in? Kind of like, "He hit his face with my fist!"
Yes, Roy, putting the land in a giant "safe" of sorts, with nobody needed to guard it, would definitely be a 'force' that would promise, not threaten, to deprive you of its contents - which you could ONLY get to by initiating force, or threats of your own.
Take down the sign that says PRIVATE PROPERTY - KEEP OUT, along with the one that says TRESPASSERS WILL BE SHOT ON SIGHT - and just let the barricade speak for itself.
The idea of depriving someone of what they think is their "natural liberty right to otherwise use" is getting more and more delicious to me.