David Wiley calls me "completely wrong" and of course I reply. Only interesting to aficionados of the long-standing discussion between Wiley and myself on the NC clause. I would only add here: licenses, like laws, never prevent bad behaviour, and I would never claim they do. To overgeneralize somewhat, in good people, culture prevents bad behaviour, and in bad people, penalties prevent bad behaviour. The addition of the NC clause tells the good people what they should do, so they don't accidentally commercialize my work. And it raises the likelihood of lawsuits against the bad people. Not foolproof, but nothing is.