The old Sed Contra used to have quite a community of people who would chime in on various topics, which might or might not be closely tied to the original post. If you have something to say, don’t be shy.
If the comment thread on this post gets long and unwieldy (I wish!), I’ll set up a fresh one.
By the way, I didn’t notice a comment policy spelled out explicitly anywhere on David’s blog, but “Do unto others as you would have them do unto you” would seem to cover it.