If any of the other instances whereby HN users have quoted the guidelines or tone policed each other are allowed then calling out generated content should be allowed.
It's constructive to do so because there is obvious and constant pressure to normalize the use of LLM generated content on this forum as there is everywhere else in our society. For all its faults and to its credit Hacker News is and should remain a place where human beings talk to other human beings. If we don't push back against this then HN will become nothing but bots posting and talking to other bots.
[0]>>45077654
Things should be judged for their quality, and comments should try to contribute positively to the discussion.
"I suspect they're a witch" isn't constructive nor makes HN a better place.
Creating a social stigma against the use of LLMs is constructive and necessary. It's no different than HN tone policing humor, because allowing humor would turn HN into Reddit.