Stanley Fish in the NYT (use the archive link to avoid paywall):

For some time now everyone has been worrying about “fake news” or the world of “alternative fact” and wondering just how and why this unhappy phenomenon has flourished. My take on this question is simple, although I hope not simple-minded: Fake news is in large part a product of the enthusiasm — not to say rage — for transparency and absolutely free speech.

I remember Lessig’s article, it made an impression on me then, and this is a well wtiten slightly updated and alternative look at the same issue.