From the start, Internet users have taken for granted that the territory was both a free-for-all and a digital disguise, allowing them to revel in their power to address the world while keeping their identities concealed. A New Yorker cartoon from 1993, during the Web’s infancy, with one mutt saying to another, “On the Internet, nobody knows you’re a dog,” became an emblem of that freedom. For years, it was the magazine’s most reproduced cartoon. When news sites, after years of hanging back, embraced the idea of allowing readers to post comments, the near-universal assumption was that anyone could weigh in and remain anonymous. But now, that idea is under attack from several directions, and journalists, more than ever, are questioning whether anonymity should be a given on news sites.... click here to read the rest of the NYT article.