>integral parts of society

I am not sure I agree with these companies being an integral part of society. I feel pretty confident they could be replaced by alternatives operated by other people and most if not all users would not notice the difference. But I've seen that happen with the early WWW with Altavista, Yahoo, etc.

And if they are an integral part of society then I think they should be heavily regulated for things like foreign and domestic propaganda and the promotion of dangerous falsehoods. It's either self-regulation (within legal reason) and whatever they decide is appropriate for their platforms, or they should be heavily regulated with guaranteed free expression as allowed by law.