There have been many examples of executives and engineers who have spoken to this effect:
https://www.businessinsider.com/facebook-engineer-resigns-tr...
https://www.youtube.com/watch?v=d6e1riShmak (Chamath Palihapitiya)
Good point, but I'll add: if the ideas they are spreading weren't infectious, they wouldn't be spreading them in the first place.
I've been on FB lately because my local government has decided that it will use FB to give background info and outlooks wrt Covid-19. From what I saw in the local groups, the "ideas" people spread are not original content, ever. They don't have those ideas, they just read them and say "yeah, share", so the ideas that make it to your feed have proven themselves many times to be infectious. There's a reason we call it "going viral".
We are simply living in the Eternal September.