IT has been a busy week or two for the ethics police — those within The Times trying to protect the paper’s integrity, and those outside, ready to pounce on transgressions by Times journalists. Thomas Friedman, the star columnist, returned a $75,000 speaking fee after accepting it from a California government agency in violation of a Times guideline. Maureen Dowd, another star columnist, was roughed up on the Internet for using a paragraph from a blogger without attribution. And Edmund Andrews, an economics writer, began promoting a memoir describing how he took out subprime mortgages he couldn’t possibly repay even...