The outrage expressed by some of the commenters on Reddit and here is curious. Clearly Facebook and other companies have the technology to make these connection

The outrage expressed by some of the commenters on Reddit and here is curious. Clearly Facebook and other companies have the technology to make these connections. Would you rather they keep it hidden to sell to advertisers and other potentially unscrupulous buyers, or expose it to you so that you can either make use of the features, or decide it's not worth playing their game?