If I just vibe-coded something and haven't looked at the code myself, that seems like a necessary thing to disclose. But beyond that, if the code is well understood and solid, I feel that I'd be clouding the conversation by unnecessarily bringing the tools I used into it. If I understand the code and feel confident in it, whether I used AI or not seems irrelevant and distracting.
This policy is just shoving the real problem under the rug. Generative AI is going to require us to come up with better curation/filtering/selection tooling, in general. This heuristic of "whether or not someone self-disclosed using LLMs" just doesn't seem very useful in the long run. Maybe it's a piece of the puzzle but I'm pretty sure there are more useful ways to sift through PRs than that. Line count differences, for example. Whether it was a person with an LLM or a 10x coder without one, a PR that adds 15000 lines is just not likely to be it.