Online Privacy no longer protected by "opting out".
The New York Times reports that the shear amount of online data available for every person can be analyzed by software to "infer, with a sufficiently high degree of accuracy, a wide range of things about you that you may have never disclosed, including your moods, your political beliefs, your sexual orientation and your health." This is true even if you avoid or limit social media posting and even if you elect to "opt out" on sites that give you a choice regarding the sharing of your personal data.
Bottom Line: assume that almost all information about you can be purchased by the highest bidder. An indication of just how much of your personal data is available for sale can be gleaned by the ads and pop up notices you see when surfing the Web, even for products and services that you did not directly search for.