If we drive a car, we have a responsibility to be good drivers.
If we use a computer or TV or printed media, we have a responsibility to remember we are Christians

So this article says:
All who, of their own free choice, make use of these media of communications as readers, viewers or listeners have special obligations. For a proper choice demands that they fully favor those presentations that are outstanding for their moral goodness, their knowledge and their artistic or technical merit. They ought, however, to void those that may be a cause or occasion of spiritual harm to themselves, or that can lead others into danger through base example, or that hinder desirable presentations and promote those that are evil. To patronize such presentations, in most instances, would merely reward those who use these media only for profit.

Jesus, please help me be a responsible media user