Regardless, this whole thing is silliness in the extreme. I wonder if this means yahoo is going to start allowing requests with the evil bit set as well :).
(http://en.wikipedia.org/wiki/Evil_bit)
EDIT: also, didn't IE revert this change?
http://blogs.technet.com/b/microsoft_on_the_issues/archive/2...
Well ... Sort of
> DNT fits naturally into this process. Customers will receive prominent notice that their selection of Express Settings turns DNT “on.” In addition, by using the Customize approach, users will be able to independently turn “on” and “off” a number of settings, including the setting for the DNT signal.