There's a no-longer-very-speculative bit of Sci-Fi waiting here about whole societies "forking" based upon the curation of their training data. Arguably social-media + bots + paid state actors means we're already there.
Now, I agree that having scalable generative AI and high-throughput-high-virality mass media (social networks) brings new unspeakeable horrors like feedback loops to the mix. Interesting times indeed.