This is to say that I reject the premise; your comment would put a chilling effect on frankly discussing other people, as though the only way to do so is through irrationality and gossip. People can critically discuss other people in an intelligent way without having "small minds", and you shouldn't attempt to infer a person's overall "mental state" from this kind of commentary, in my opinion.
That is a fair criticism. I still think there is a difference in degree between (A) reading a long, thoughtful article and responding with unkind speculations about the author, and (B) reading such speculation that has little content in it and responding in turn with unkind speculations about the comment's author; but only a difference of degree, not of kind, I admit.
> your comment would put a chilling effect on frankly discussing other people, as though the only way to do so is through irrationality and gossip.
The proverb I quoted would do that, sure, which is why it's explicitly marked as only a decent (not excellent) heuristic. There are honest, thoughtful ways to go about discussing and criticizing people. Speculations and borderline conspiracy theories are not among them.
It also doesn't apply here, because the grandparent comment is not trying to refute PG's argument, it's mounting an entirely orthogonal one. So yes, I do agree it's not directly discussing the content. But that's also pretty characteristic of most HN threads.
People on HN usually talk about the ideas they have which are evoked by the article. They do not as a rule engage in formal refutation or advocation of the article's core thesis, unless it's very technical in nature.
My interpretation of the quote has always been that discussing people means something along the lines of gossip, i.e. specific people. That being said I think there's a clear difference between simple gossip and critical discussion of others, which can be very intellectually elevated.
If your first reaction reading this essay is "PG is trying to big himself up as an independent thinker", that tells me more about your attitude and mental state than about PG.
Forgive the cliche, but "great minds discuss ideas, average minds discuss events, small minds discuss people" is a decent heuristic, with good reason. Once you start seeing attempts to communicate as status contests automatically, you're not in a useful frame of mind for rational discourse any more.