Revenge as a tool is a weapon of selfish gains that is used to satisfy ones own anger. It may be acceptable socially only if it is carried out within the social limits but commonly isn't. Though revenge does give some degree of mental satisfaction it may lead to serious consequences if it is allowed to become more ambitiously sought then necessary. It often becomes a obcession that can land one in jail if not an early grave. In all it is only worth it if it can be carried out in proper course by following the social obligations and restrictions of the law and order.