I have been repeating the following to people in emails of late, in response to queries about the free-market opposition to intellectual property, so below I provide a concise list of links for some good material explaining the libertarian/free-market case against IP:
1. The superb new book Against Intellectual Monopoly, by economists Boldrin and Levine.
2. Jeff Tucker's excellent commentaries on Boldrin and Levine.
3. Some of my material, many on Mises.org. Such as: my little book, Against Intellectual Property, my article "There's No Such Thing as a Free Patent," and my presentation, "Rethinking IP Completely," all available here.
4. Mike Masnick's frequent and excellent anti-IP commentary on Techdirt.
There are many other excellent anti-IP pieces, but this is a good starting point.
Don't forget those peculiar people who are all for intellectual property, but still against intellectual monopoly, i.e. copyright and patent abolitionists who would nevertheless uphold authors' and inventors' natural exclusive right to their work.
I'd suggest categorizing them with the slavery abolitionists who nevertheless upheld some people's natural exclusive right to other people.
Jesse, unlike the material or intellectual product of labour, human beings cannot be considered property. It may be amusing to you to suggest such a substitution should be inferred in distinct but similar statements of principle, but it does you no credit.
FWIW I think Mike Masnick would reject the idea that his Techdirt blog is "anti-IP".