With MS it’s not just what you do online, The worry is there from the moment you boot the MS OS. Everything you do on your computer even off line is updated to MS every time you do eventually make a connection to the internet.
IMHO MS has too much to lose to do that. MS's cash cow is what it does in corporate America, especially with it's surging cloud business. If they were to be found out to be snooping on your data it'd be a complete wipe-out of their business model. You might as well try to win a state-wide election in Alabama saying you hate football. :)