Detection of "LLM" is a red herring. Quality is what matters. Always has been. Assess comment quality holistically, and you'll be fine.
We can consider this the carcinization of online discourse - everything evolves towards the optimum of LLM summarization.
Do you believe this?
But I suspect a lot of people on HN only view these threads as data and that for them "quality" only exists within the semantics and structure of the text itself, and the human element doesn't matter to them.
Drown it out with high quality submissions and high quality comments.
Just like any other behavior you don’t like.
[1] logically upvoting is also an option.
Smoke me a kipper i'll be back for breakfast.
No can do, too many false positives considering the usual demographics.
LLM detection is basically witchcraft, though, for all but the most obvious cases.