p.s. Of course I think that copyleft advocates who really want to ensure people have software freedom rather than just being enamored of a hack should be always on the lookout for cheaper and/or socialized enforcement (as implied above, control of distribution channels that matter, and state regulation).

Sadly I have no suggestions for code of conduct advocates. They're simply doing the obviously right thing against huge cultural barriers. But I'd love to hear about institutional or mechanism changes that would help further!