Whoever is submitting the code is still responsible for it, why would the reviewer care if you wrote it with your fingers or if an LLM wrote (parts of) it?
The problem is that submitters often do not feel responsible for it anymore. They will just feed review comments back to the LLM and let the LLM answer and make fixes.
This is disrespectful of the maintainers' time. If the submitter is just vibe/slop coding without any effort on their part, it's less work to do it myself directly using an LLM than having to instruct someone else's LLM through GitHub PR comments.
In this case it's better to just submit an issue and let me just implement it myself (with or without an LLM).
If the PR has a _co-authored by <LLM>_ signal, then I don't have to spend time giving detailed feedback under the assumption that I am helping another human.
Right but these are bad actors, roughly speaking, so why should I expect them to disclose the fact that they're using LLMs to me?
If someone is repeatedly sending me slop to look at I'll block them whether or not they tell me an LLM was involved