Well, OK...if I buy a house knowing that that it has a gun-waving Libertarian lunatic inside, then I can&#x27;t very well complain that the difference between that home and a theoretical, Libertarian-free home is &quot;opportunity cost&quot;, and demand that the Libertarian be removed to maximize my profit.<p>The opportunity cost came when I bought the house, not when I realized that Libertarians are insane and unpleasant. That part is called &quot;buyer&#x27;s remorse&quot;.