A provocative – sometimes brilliant, sometimes uncomfortable and sometimes potty-mouthed – screed by John Stewart delivered way back in 2006, targeting the partisan talking-head yapfest that has hurt our important national conversation. To be fair to the talking heads, isn’t it – in fact – the viewers who keep them employed (uh, that would be us)? If we actually watched the most in-depth, civil and factual programs on TV, wouldn’t the networks be clambering to bring more of them to us?