I agree, without a current survey to establish its worth, then it probably isn't worth much.
However, I think what has greatly outraged the public is the fact that Uncle Sam can force people off their property by annexing the land around them, thus making them in effect, trespassers on their own land.
Given their previous record with the native people of the country, I guess they are displaying a certain consistency.
"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"