This has already happened. It appears that Israel has poisoned the Common Crawl.
https://www.dropsitenews.com/p/israel-brad-parscale-ai-chatb...
https://www.dropsitenews.com/p/israel-brad-parscale-ai-chatb...
Someday, the publishing of LLMs that generate video will be the thing historians talk about most from this period of history. Even if the vast majority of people today don't realize it has been happening for a couple years at this point.