Agreeing with Wesman Todd, on this one. As they say so often, "Sex sells." So does fear. Fear can be used to create opposition, because people tend to lash out when they are afraid. If someone in control of a particular media outlet wishes to oppose certain changes in the social or moral order, fearmongering can accomplish this, a la Fox News. It also can be something as innocuous as the fact that people simply want to be apprised of what they feel might threaten them, and pay greater attention to such things. Thus, it is in the media's benefit to create, exaggerate, or seek out threatening and fearful topics.