Is anybody justified to do wrong because he sees that everybody does it?

No, an individual is not justified in doing wrong simply because others do it. Morality and ethics are based on principles that transcend popular behavior; just because a majority may engage in wrongdoing does not make it right. Each person is responsible for their own actions and must evaluate their choices based on ethical standards rather than societal trends. Ultimately, accountability lies with the individual, regardless of the actions of the crowd.