http://mises.org/daily/3863I find this whole push against IP rights to be quite puzzling. What possible benefit can come from making it legal to rip off and sell other peoples' work? The benefits of copyright seem so obvious and the downsides basically non-existent. Patents are a little tougher because there is inefficiency when ideas are too obvious, or two people are both working an idea and one beats the other by a short time, etc. But these are implementation difficulties, and I still wonder why you would go out of your way to make a case for ripping off other peoples' inventions. How could medical innovation survive without IP rights? I find his statement that IP law is on balance a negative very hard to believe.
The part where he bases his argument on homesteading is pretty rough too. Maybe someone has rigorously defined this idea, but if so I've never seen it. What exactly constitutes "mixing my labor" with something? How much land could a person homestead? And it's all kind of a dead end anyway, trying to tie legitimate ownership to a demonstration of a full chain of "legitimate" transfers starting from homestead to the present day. Nobody can do that with anything they own. Are they really suggesting we try to unravel these chains of ownership and right all historical wrongs?
There's also this notion that the rights he accepts, unlike IP rights, are somehow non-arbitrary. Maybe assault and outright theft are somewhat obvious (but I bet you could cloud those up with a little thought), but how about invading your rights with respect to noise, verbal assault, bright light, smell, pollution, etc? How about probabilistic rights violations - putting you or your property at risk but not actually doing anything (right then)? All of these require legal interpretations or are arbitrary. The best we can do is work toward the utility maximizing set of rights. Why would IP be any different?