Having worked with Jon on both open source (PyMusique) and commercial (we worked at the same startup for a while) projects, I will say this: He made some stupid mistakes around DeCSS, and since has done great things for the open source community and the anti-DRM crusade in general. Before he's crucified for his anti-Linux remarks and license mishaps, bear in mind that he was all of 16 when DeCSS was released, and he's since done a lot of fully original work (alone and in teams) that's freely available.