I don't think it's the ads people need to be worried about. It's pages, groups and their "users" posts manipulating people. News flash: a majority aren't even real human users.
Ironically, I've posted there a couple of times in a way that (barely) went against their own groupthink and got downvoted like crazy.
My personal theory is that we have been mingling with AI generated content long before Chat GPT was revealed to the public, at least in the last 10-15 years. And that Chat GPT was not the first on the block manipulating people with the technology. I just think this based on the fact that the NSA was spying on people long before whistle blowers revealed it, same has to go for AI manipulation by various government agencies and non government "bad actors". We may get confirmation of this within the next 10-15 years if someone blows a whistle.
Are we talking about MSM here? Because those doing it are real human users, some of them quite famous.