A milestone in DiDIY history: The Australian police has (very likely :) been reading up on our work about ethics and the New South Wales Parliament decided to ban not certain objects, but certain digital files! http://3dprint.com/106940/australia-ban-3d-files-guns/
Vincent C. Müller's blog
A simple explanation of Digital Do-It-Yourself and its ethical problems
With digital DIY you can now make your own gun at home, and nobody can control you. Since gun control relies on the ability of the state to enforce it, it is failing now. The digital DIY of weapons will be a real war of all against all.