"Expropriation without compensation".
It happens at the micro level all the time, as we speak. Big energy companies threatening lawsuits on private land owners who are reluctant to participate for instance.
Don't think for one second that it can't happen here. No tresspassing signs? Yes, and a clan of natives on hand with a vested interest in defending the property.
Out there, I know, but a possible scenario if friendly negotiations fail.