> But, I get it, the tech giants are all about quantity-over-quality and Facebook's ad revenue would drop to basically nothing (by their standards) if they started vetting each ad campaign manually, so here we are.

Facebook makes well over 20 billion dollars in net profits annually. They could easily invest a couple billion dollars into moderating better advertising and content, but since "user happiness" and "cost externalized to society" (e.g. people injured by bad products, cost of buying a new gadget because the old one barely lasted a year, costs of viral "challenges") is harder to quantify than "amount of dollars in profit", they all don't.

This is why government regulation is needed: to hold companies accountable for externalized costs.