The emergence of the neologism post-truth raises once again the question of journalism's capacity to distort reality. Social networks have entered the world of communication with great force, but their responsibility is not comparable to that of journalism. Non-professional communicators have a personal ethic code, but the profession has a deontological code. Informative journalism is based on its credibility and the truth of its stories. In this paper, we will reflect on the ethical crises of journalism and the dangers they entail to its credibility, if not resolved properly.