An anonymous reader writes "Thought Do Not Track was strictly a geeks' issue? Think again. After Microsoft was slapped down for enabling DNT by default in Internet Explorer 10, the co-chairs of the US's Congressional Bi-Partisan Privacy Caucus have sent a strongly-worded letter to the W3C urging it to reconsider. As webdev360.com points out, it's an interesting (unprecedented?) example of Congress interacting with the standards body: 'Whether members of the [working group] will take kindly to the Representatives' interference remains to be seen. Ed Markey's legislative director, Joseph Wender, has brought the letter to the attention of the group's mailing list, but, as of the time of writing, he hasn't received any replies.'"