Did you really just accuse me of bad faith for asking you for the most basic of discussion content? Asking someone to prove their stance is a negative, ever?
Is this a thing you'd accuse someone of in a face to face conversation?
Which, by the way, you did not do, which is why I asked for "concrete". A concrete example would be "This particular behavior in this particular community happened before the CoC was implemented, here's an example or two (link), the CoC addressed it in this way (link), and the negatve impacts you're worried about didn't manifest".
Just saying "Python and Pycon" doesn't even begin to provide enough context. The only Pycon example I can think of off the top of my head is the height of incivility: getting people fired for jokes.