A little over a year after the IPO, on June 12th, 2014, Facebook quietly announced a change to its terms of service. "Starting soon in the U.S., we will also include information from some of the websites and apps you use," the company wrote. "This is a type of interest-based advertising, and many companies already do this."
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In perhaps the creepiest example, Facebook applied for (and received, last year) a patent for a tool called Techniques, for emotion detection and content delivery. It would use the camera in your phone to take pictures of you as you scroll through content. Facebook would then use facial analysis to measure how much you did or did not like the content in question, so as to determine what kind of stuff to send your way. Ideas like this are what make Facebook, at times, feel like a giant blood-engorged tick hanging off your frontal lobe.""
Source:
https://www.rollingstone.com/politics/features/taibbi-facebo...