Finally looking at Bruce Perens' "Post Open" licensing drafts and good heavens it's even worse than GPLv3 in terms of focusing on the perceived threats du jour rather than any coherent overall concept. The degree to which it goes beyond copyright law (various things that are plausibly fair use in the US are grounds for termination) is especially egregious. It's explicitly not free software, which I don't think is inherently bad, but it's also just a bad license.