Anyone here up on AI training in this sense?

Example, google certainly indexes search fast. I have googled a product posted 10 mins ago in a very low-key specialized audio forum that is really not popular, and bam, google is liking to the post.

OK, so if google is training bard in real time, could it not encounter the classic text book example of training on future data? e.g. we talk about it, or what it might or might not do in HN, Twit, (God help us some meta-universe), or elsewhere, and it is training on that as factual input? What then? Tail wagging the dog? What mechanisms are in place to make that be noise and not facts, I wonder.