A usual round of media self-criticism turned into a schoolyard brawl last week, as editors, reporters and bloggers traded insults over a front-page article in The Washington Post, all at the very online water cooler where they usually get their news about the industry. The Post article, which ran on Nov. 29, was about rumors of Barack Obama’s ties to the Muslim world. snip Then things got really ugly. On Dec. 10, Chris Daly, a Boston University journalism professor, posted an entry on his blog that turned the debate over the merits of the article’s reporting into a debate over...