Now that is what I call a bait-and-switch
Isn't the irony just overflowing ? You have to go and declare yourself, handing over precious personal information in the process, in order to temporarily(*) put a stop to the information that Microsoft is already extracting greedily.
In short : you can't win.
That is what happens when companies confuse the ability to do something and the right to do it.
* : temporarily, because we all know that those choices will be reset every now and then, ala Facebook