Yglesias takes a stand:
[T]hink about the strange influence that daytime cable news has on American politics. The three networks combined have an aggregate daytime audience of roughly zero. But even though the audience, looked at nationally, amounts to rounding error the networks are hugely popular among the tiny number of people who work in professional politics. Just like traders have CNBC and Bloomberg on in their offices, political operatives are constantly tuned in to what’s happening on cable news. The result is a really bizarre hothouse scenario in which people are basically watching . . . well . . . nothing, but they’re riveted to it. How things “play” on cable news is considered fairly important even though no persuadable voters are watching it. And cable news’ hyper-agitated style starts to infect everyone’s frame of mind, making it extremely difficult for everyone to forget that the networks have huge incentives to massively and systematically overstate the significance of everything that happens.
I've stopped going on for these reasons (and complete lack of time). The web has smarter opinions, far more nuance, and real, accessible, checkable data.