> What about submarine LLM submissions?

That would constitute an attempt to circumvent their policy, with the consequence of being banned from the project. In other words, it makes not clearly labeling any LLM use a bannable offense.

Don't ask don't tell looks like a reasonable policy. If no one can tell that your code was written by an LLM and you claim authorship, then whether you have actually written it is a matter of your conscience.

I read that as benefit of the doubt, which is a reasonable stance.

As a native English speaker I read this as two parts. If it's obvious, the response is immediate and not up for debate. If it's not obvious then it falls in the second part - "any attempt to bypass this policy will result in a ban from the project".

A submarine submission, if discovered, will result in a ban.

Using the phrase "virtual signaling" long ago became a meaningless term other than to indicate one's views in a culture war. 10 years ago David Shariatmadari wrote "The very act of accusing someone of virtue signalling is an act of virtue signalling in itself", https://www.theguardian.com/commentisfree/2016/jan/20/virtue... .