We don't need to ring that bell for search engines, it was already drowning in Wikipedia co-authored blogspam that this won't change much.
"Dead internet theory" posits that bot-generated comments and content is more common than we think. Reddit actually has subreddit simulators that are nothing but bots talking back and forth to each other, using training models based on actual Reddit comment threads. It's not chatGPT level, but it's frightening to see how bland most 'real' Reddit conversations are.