As regards the utilitarian position, the proof contains its ultimate refutation. It demonstrates that simply in order to propose the utilitarian position, exclusive rights of control over one’s body and one’s homesteaded goods already must be presupposed as valid. More specifically, as regards the consequentialist aspect of libertarianism, the proof shows its praxeological impossibility: the assignment of rights of exclusive control cannot be dependent on certain outcomes. One could never act and propose anything unless private property rights existed prior to a later outcome. A consequentialist ethic is a praxeological absurdity. Any ethic must instead be “aprioristic” or instantaneous in order to make it possible that one can act here and now and propose this or that rather than having to suspend acting until later. Nobody advocating a wait-for-the-outcome ethic would be around to say anything if he took his own advice seriously. Also, to the extent that utilitarian proponents are still around, they demonstrate through their actions that their consequentialist doctrine is and must be regarded as false. Acting and proposition-making require private property rights now and cannot wait for them to be assigned only later.
— Hans-Hermann Hoppe, Economics and Ethics of Private Property, p354.