And your question about how OpenAI prevents their training data from being corrupted is one we should be asking as well!
Yes, this is an existential problem for Google and training future LLMs.
See also, https://www.theverge.com/23642073/best-printer-2023-brother-... and https://searchengineland.com/verge-best-printer-2023-394709
... it's uncanny how it always finds what you thought you were looking for!
Seems trivial. Only use old data for the bulk? Feed some new data carefully curated?
I'm only half joking.... I think we likely will end up with flags for human generated/curated content (and it will have to be that way round, as I can't imagine spammers bothering to put flags on AI-generated stuff), and we probably already should have an equivalent of robots.txt protocol that allows users to specify which parts of their website they would and wouldn't like used in the training of LLMs.
It will need to be based somewhat on the honor system (just because someone's proved they're a human doesn't mean they won't put their attestation on auto-generated text), but it definitely sounds better than nothing.
They'll still need to incentivize it somehow, though. Why do I as a human want to add that meta tag? If the answer is "better search ranking" then it renders the whole scheme mostly pointless because obviously spammers will want to acquire the attestation and attach it to their auto-generated content.