Who has or should have primary responsibility for managing fake news and its consequences (i.e., social media companies, advertising companies, business, everyday citizens, government authorities, or others)? Why?

Fake News – Case

Who has or should have primary responsibility for managing fake news and its consequences (i.e., social media companies, advertising companies, business, everyday citizens, government authorities, or others)? Why?

Is it unethical for a company to allow its ads to run on a controversial website—such as one that is promoting untested scientific data or one that includes what is commonly accepted as hate speech—even if doing so generates significant revenue for the company? Explain your position.