66 In discussing how justice should evolve in response to changed circumstances, David Schmidtz presents the case of Hinman v. Pacific Air Transport (1936), where a landowner did not want airlines to “trespass” (that is, fly) over his property, and thus sued them, but lost on the grounds that acceding to his claim would have brought all air traffic to a halt. Schmidtz points out that, while the right to say no is at the center of a system of property, “[it] cannot be used as a weapon of mass destruction. The right to say no is supposed to facilitate community, not enable people to hold a community for ransom”: David Schmidtz, “Nonideal Theory: What It Is and What It Needs to Be,” Ethics 121, no. 4 (2011): 772–96, 785. Although the circumstances are very different, a similar reasoning underlies cases of necessity, when saying no to an illegal action by the needy would mean cutting off their only chance to subsist. In Hinman v. Pacific Air Transport, the judge anticipated that what had been unproblematic and therefore unregulated so far (that is, control over airspace) would have to be regulated so that individual landowners may not say no to airplanes flying over their properties. In cases of illegal occupation, squatting, pilfering, and shoplifting by chronically deprived individuals (assuming that the aforementioned conditions are met), one could question the right to say no to the owners of the occupied/taken property on the grounds that only a radically unjust system of property rights could have allowed those situations of necessity to arise in the first place. What needs further defense, then, is the right to say no in a context where the laws themselves do not facilitate community, but hold people (in this case, the poorest) for ransom.