I don't think there are any natural/inherent human rights. If there were, then they wouldn't be able to be violated, or else what would it mean to have a natural right? Rights are things given to us by law. And the law doesn't allow vigilante/revenge killings. So no, we don't have that right. Should we have that right? As much as I like hearing about bullies and other kinds of abusers being harmed or killed, I know that's wrong, and philosophically I don't believe in vengeance/retribution, so I'd say no. https://philosophy.inhahe.com/2017/02/05/is-hatred-ever-truly-justified/