> If you believe the outputs of LLMs are derivative products of the materials the LLMs were trained on

In that case a lot of proprietary software is in breach of copyleft licences. Its probably by far the commonest breach.

> You are now party to violating the original materials' copyright by accepting AI generated code. That's ethically dubious

That is arguable. Is it always ethically dubious to breach a law? If not, which is it ethically dubious to breach this law in this particular way?

> In that case a lot of proprietary software is in breach of copyleft licences. Its probably by far the commonest breach.

Sure, but this doesn't really seem relevant to the conversation. Someone else violating software license terms doesn't justify me (or Debian, in the case of TFA) doing so.

> Is it always ethically dubious to breach a law?

I'm not really concerned with the law, here. I think it is ethically dubious to use someone else's work without compensating them in the manner they declared. Copyright law happens to be the method we've used for a couple hundred years to standardize the discussion about that compensation, and sometimes enforce it. Breaching the law doesn't really enter into the conversation, except as a way our society agrees to hold everyone to a minimum ethical standard.

> I'm not really concerned with the law, here. I think it is ethically dubious to use someone else's work without compensating them in the manner they declared.

OK, that is reasonable. I do not think copyright is a good mechanism though, and I think the need to compensate depends on multiple factors depending on what you use a work for and under what circumstances.