I don't think there is a general philosophical point of view on "media politics" though historically and today philosophers have tended to oppose the kind of one-way rants that one hears in which no objections are considered or, if they are entertained, they are shouted down (this is based on my occasional listening to right wing radio in the USA, e.g. Jason Lewis, Rush...). Even Plato who, in the Republic, defended a modest form of censorship and has some very negative views on democracy, celebrates in all his dialogues (including the Republic) a dialogue in which objections are patiently entertained and positions re-thought. Ideally, one may describe democracy as a form of government in which change is brought about non-violently through argument. In this sense, all of Plato's dialogues support a democratic culture. Popular media in the USA does seem to me to involve some political theory (there appear to be full discussions of individual rights, accountability, the environment, entitlements...

Thank you for this question! A minor point at the outset: I think a great deal of the best teaching of philosophy involves the practice of philosophy. There are perhaps some philosophy teachers who simply teach what Plato etc thought, and expect students to master certain texts with critical skills. But I think most do not stop there, but seek to engage students in thinking through the great themes of philosophy about values, moral obligations, virtues, political theory, the nature of the world, the limits of knowledge, the nature and value of human and nonhuman animal life, the possible existence of God, and so on. But getting to your broader question, more professional philosophers are applying themselves to issues such as global justice, practical ethical and political positions, medical ethics, economic fairness, and the like. Granted, these are sometimes in textbooks designed for university / college courses, but sometimes it is through education that political change arises. After all, it was...