Something I've noticed through moderation is that people are much more easily duped by generated comments if they like the content and/or agree with the point. We've seen several cases where a bot-generated comment has been heavily upvoted and sits at the top of the thread for hours, and any comments calling it out for being generated languish at the bottom of the subthread below other enthusiastic, heavily upvoted replies. This shouldn't be surprising, given what we've seen of LLM chatbots being tuned to be sycophantic, but it's interesting to see it in effect on HN.

This is another reason why it's good to email us (hn@ycombinator.com) rather than commenting when you see generated comments.

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dooglius 4 hours ago | parent [-]

Do you have reason to believe that you have a reliable way in these cases of determining whether the comment is generated?

	▲	tomhow 36 minutes ago \| parent [-]
		Having been reading generated comments almost daily for over three years now, I have a pretty good sense of it. There's a bunch of signals: how new the account is; how the comments look visually (the capitalization and layout of the paragraphs, particularly when all of one user's comments are displayed in a list). Em-dashes and short, emphatic sentences, make it more obvious of course. There are cases that are more borderline; usually when someone has used a translation service or has used an LLM to polish up a comment they wrote themselves. For these ones there's less certainty, and whilst we discourage them, we're not as rigid in our aversion to them or as eager to ban accounts that do it. But ones that are completely generated are still pretty easy to spot, even just from visual appearance.