In reading Han Hoppe's The Economics and Ethics of Private Property: Studies in Political Economy and Philosophy, I came across a great comment. (See Kinsella's review here.) In his appendix he has included "Four Critical Replies." The third reply points to a Loren Lomasky criticism of Hoppe's earlier book A Theory of Socialism and Capitalism. Lomasky says of Hoppe's A Theory of Socialism and Capitalism: "It is no less than a manifesto for untrammeled anarchism."

Hoppe follows with:

As explained in my book but conveniently left unmentioned by Lomasky, untrammeled anarchism is nothing but the name for a social order of untrammeled private property rights, i.e., of the absolute right of self-ownership and the absolute right to homestead unowned resources, or employing them for whatever purpose one sees fit so long as this does not affect the physical integrity of others' likewise appropriated resources, and of entering into any contractual agreement with other property owners that is deemed mutually beneficial. What is so horrifying about this idea?