Michael Delli Carpini of the Annenberg School for Communication said large companies like Facebook have a responsibility to screen ads for misleading content. “One person’s inaccuracy is another person’s speculation hat. What is and is not true is not easily determined a lot of times,” he said.
https://www.wsj.com/articles/mark-zuckerberg-speech-draws-ire-as-he-attempts-to-burnish-facebooks-image-11571432830 The Wall Street Journal