This paper addresses the changes in the role of librarians as information intermediaries due to the introduction of new forms of digital content brought about by modem information and communication technologies. The main focus is on the way in which these changes have affected the moral responsibilities of librarians. Six content trends are identified in support of this claim. These are: the growth in volume; amount of noise; sharing of content and information participation; personal space; collaboration and naive use. The ethical challenges of these six trends are discussed. Because of the unpredictability and uncontrollability of contemporary digital content, a case is made that the traditional model of retrospective responsibility, according to which responsibility is assigned based on causality, should be supplemented with a positive prospective model of responsibility according to which librarians also need to look 'forward' anticipating possible harmful impacts of modem ICTs. It is also argued, based on the open and interactive nature of new forms of content, that there should be a form of shared and distributed responsibility, which should include not only librarians, but also Internet service providers, library users, and software designers.