> author/publisher reputation is a far better signal than looking for AI tells

Hardly seems mutually exclusive. Surely you should generally consider the reputation of someone who posts LLM-responses (without disclosing it) to be pretty low.

A lot of people don’t particularly want to waste time reading the LLM-responses to someone else’s unknown/unspecified prompts. Someone who would trick you in to that doesn’t have a lot of respect for their readers and is unlikely to post anything of value.