In what would appear to be the first direct legal challenge to the Diet Madison Avenue Instagram account, former CP+B chief creative officer Ralph Watson has filed a civil case accusing it, along with two anonymous parties who allegedly help run the account, of defamation. Campaign first reported on the suit earlier today. The case… https://www.adweek.com/agencies/defamation-suit-filed-against-diet-madison-avenue-may-test-the-limits-of-speech-on-social-media/