I never said codes of conduct were all perfect. Some (probably most) are certainly flawed and could do with improvement, but the underlying goal is generally what I described. I feel the basic idea is both sound and laudable, so I encourage people to take part in iterative improvements, rather than rejecting the idea outright.

And yes, treating other people with basic decency is actually a tricky thing that needs to be spelled out for some people. A lot of people actually - you gave some great examples, whether you meant to or not.