That’ll end up in an arms race where you refine the gibberish to be more and more believable while the crawlers get better and better at detecting poison wells. The end state is where your fake pages are so close to the real thing that humans can’t tell the difference

Humans have been refining their gibberish for centuries.

I admire your idealism that "the real thing" is coherently different from good gibberish. The poisoned version of the same article is great: https://heydonworks.com/nonsense/poisoning-well/ (I love me some surrealism so gibberish is something I sometimes choose to input into my own model in my head).

The scary part of AI is that it shows how crappy most of the training material is.