I'm still curious whether the Free Software Definition's choice to require the ability to use free software for *any* purpose is entirely deliberate - is there any writing on why free software must permit being used to restrict people's ability to exercise the four freedoms?
(I agree with the argument that it would be extremely difficult to write a license that enshrined this without restricting legitimate use cases, but if someone were able to do so, /should/ it be free software?)