So maybe they invite three guests on to discuss a topic like privacy: one a DoD official, one from a conservative think tank and a centrist writer. Suddenly the range of "acceptable" viewpoints is conveniently narrowed and the remainder is implied to be "fringe".
Or maybe they massively inflate the actual threat of things like terrorist attacks (because fear and xenophobia get ratings too) and give it a disproportionate amount of coverage. Now everyone who watches or even flicks by that channel is maybe more likely to talk about it at the water cooler or whatever.
This can affect the broader culture, which can in turn influence people who don't even watch the news on TV*
So how do we get people to place a higher value on, say, their liberties and human rights instead of fear of the spectre of terrorism? Is it possible? Can we get people to understand and care about relevant historical examples?
* Not to imply this is the case with your Mom!