Why precisely do we want to change land ownership? The answer seems to me to be quite clear: to inhibit land speculation, to inhibit the private exploitation of the scarcity-value of land, to inhibit as we might say the cornering of land.
Yeah, it's legal in the United States. It's part of our Constitution. You know, the right to bear arms is because that's the last form of defense against tyranny. Not to hunt. It's to protect yourself from the police.