We can't, or else it's no longer Open Source. BUT, maybe there's room for a reasonably permissive proprietary license that is based around moral restrictions.

We can't, or else it's no longer Open Source. BUT, maybe there's room for a reasonably permissive proprietary license that is based around moral restrictions. Plenty of people still use proprietary software; so if you're already doing that, I could see a semi-open "ethics license" fitting in. You couldn't include it in other GPL or MIT licensed libraries, but again, if you're already building proprietary software, those restrictions probably don't matter to you.