"Oh no, those dang dirty Windows trolls are invading mah privacy!, fuck them!, I won't budge to them. I'll just continue using my super safe and mostest bestest OS Linux computer and then I'll be uploading all my personal data to Facebook, Twitter, Tumblr and all the other social media, those are perfectly safe and don't spy on you and sell your things to corporations for ads and self promotion."
It's the same story as always, people said the same of Vista, said the same of 7, said the same of smartphones, etc. True or false, if someone wants to fuck with you, he's going to do it. All this crap always comes up from perople and the paranoia of thinking "MAH PRIVACEY !!!11!!223457567", when they don't realize they are already handing over all their data to other sites and companies (and it kind of almost always been like this).
Anyway, I upgraded to Win 10, just when you're installing they give you the option to turn off anything you want, unless you're the kind of person who just hits "next" like crazy and then whine and complain of the defaults settings. I have no problem keeping track on what goes in or out the PC so far.
On other note, to be fair, it's not a big deal or a huge improvement over 8.1, they just got rid of Metro (about time) and added some silly things, but other than that, I'm not really impressed.