I will even confess a natural suspicion of corporations. My anxiety shoots up when, for instance, the three largest oil companies have closed door meetings with the vice president (who also happens to be waging war against an oil producing nation). Egregiously discomforting exceptions not withstanding, out-of-hand assumptions about a media corporation's motive is akin to "proving" that the driver was speeding because that car model is popular with professional auto racers.
Corporations don't like me, they like money and I'm okay with that. They are businesses first and foremost, and that means that a cartel-like collusion on providing news with a liberal bias will still have to make business sense. As a nation, the media consumer market will split down the middle of the political divide so it would make no sense for a cartel to alienate an entire half of the media market. As Daniel Sutter argues in his excellent and thorough essay, there is no profit advantage for this kind of collusion.
So when a fan of a political candidate blasts media bias for the the poor coverage Ron Paul receives, I offer a simpler explanation. Maybe it's because nobody likes him. The news, after all, is just responding to consumer demand. (And Ron Paul supporters do like consumer driven markets, don't they?) Thus, while it's true that I regularly want to kick in my TV, I take comfort in knowing that all over the country, spanning race, creed, income and political beliefs, millions of other Americans also want to kick in their TV. And I figure that as long as the MSM is pissing off all of us, the system is still working.