[ben0x539]

You don't need to codify all expected social norms because the CoC is applied by and for people, who can extrapolate to fill the gaps. You do need to give them a starting point, and since there is no obvious universal definition of "don't be a dickhead", you probably want to list some concrete examples.

If people are idiots about enforcing the CoC, I'm willing to bet they'd have been idiots about enforcing the "don't be a dickhead" rule too.