No proof of harm is not proof of no harm. Narcissists have mastered the art of harming others and leaving no traces or proof. Narcissists will frequently recruit willing or non suspecting third parties to stalk, bully, harass, physically abuse and even falsely accuse their chosen targets. This is called abuse by proxy and is used frequently by malignant narcissists. The main thing to remember with narcissists is that they keep their true self hidden very well from most people.