One might understand that posting LLM content in a community where people probably love FOSS and software freedoms, posting the output of something that has taken in a lot of GPL code and produces it on command (hence violating the license,) would not be seen favourably.

would you be mad if someone downvoted a comment about eating meat on a vegan community?

Yep. It increases incentive to do deceptive secrecy about using LLMs to help build things. I'd rather know. I'd rather be upfront about it in my own stuff (like fin, which suffered similarly).

I don't understand the "don't tell us if you used an LLM" vibes, and I'm not sure those doing it realise they are doing that and probably think they're contributing to "don't do LLM" vibes.

Man, I hear you. STFU about AI slop. Decide whether you like the result or find it useful. This knee-jerk rhetoric is exhausting.