The Smear campaign is gossip on steroids. All narcissists who are rejected by others will target the rejecter through defaming that person's character. They have no remorse, spewing lies about the victim of their continued abuse, who finally cut them off.
I really really wish everyone would think before they speak. Important to always be honest, and we always have the right to stand up for ourselves when we are mistreated, but no one ever has the right to hurt someone else with their words. Be assertive. Not aggressive or hurtful.