I don't know why Microsoft are bothering with this. The 'I have nothing to hide' crowd could not care less and those that are quite fascinated by everything NSA are not going to ever believe that Microsoft are anything but evil.

The funniest Microsoft story for me was the one regarding their former security chief. Nowadays he won't use Microsoft products or anything else where he can't see the source code. Until such time as Microsoft open source the stuff they churn out then all one can do is 'believe' them to be good and, after finding out how in bed they are with the military-industrial-complex, I just do not trust them.