It's interesting to think about this in terms of something like Ars Technica's recent publishing of an article with fake (presumably LLM slop) quotes that they then took down. The big news sites are increasingly so opaque, how would you even know if they were rewriting or taking articles down after the fact?

This is typically solved by publishing reactions/corrections or in the case of news programs starting the next one with a retraction/correction. This happens in some academic journals and some news outlets. I've seen the PBS Newshour and the New York Times do this. I've also seen Ars Technica do this with some science articles (Not sure what the difference in this case is or if it will take some more time)