I really have to object to this addition: "This Code is meant to cover all interaction between community members, whether or not it takes place within postgresql.org <http://postgresql.org> infrastructure, so long as there is not another Code of Conduct that takes precedence (such as a conference's Code of Conduct)."
I second that objection. It is not in PGDG's remit to cure the world, for whatever form of cure you ascribe to. This is especially true as 'community member' has no strict definition.
I understand the concern, however, if you look at how attacks happen it is frequently through other sites. Specifically under/poorly moderated sites. For specific examples, people who have issues with people on Quora will frequently go after them on Facebook and Twitter.
these aren't a solution looking for a problem. If we just want to look at the clusterfuck that is happening in the reddis community right now we can see conversations spilling onto twitter and into ad hominem vitriol.
Ask yourself, if this was a government agency tracking your speech across platforms would you be as approving? Personally I find the whole thing creepy.
No one is tracking anything as part of the CoC. That's nothing but a straw man argument.