Reuters: A U.S. judge has ordered Yahoo to face a nationwide class-action lawsuit accusing it of illegally intercepting the content of emails sent to Yahoo Mail subscribers from non-Yahoo Mail accounts, and using the information to boost advertising revenue. In a decision, U.S. District Judge Lucy Koh in San Jose said people who sent emails to or received emails from Yahoo Mail subscribers since Oct. 2, 2011 may sue as a group under the federal Stored Communications Act for alleged privacy violations.