That's the question a privacy activist is posing with a campaign to get Facebook to tell him everything it knows about him. Dehaye asked Facebook in December 2016 for information advertisers gathered about him through a tool called the Facebook pixel. For instance, a soap brand could target Facebook advertising at people who had visited their website while logged into Facebook. Facebook told Dehaye that it was "not technically feasible" for them to provide the information he had requested. We also fully comply with our legal obligations to provide him with access to his data," a Facebook spokesperson told CNN.

Source: CNN March 26, 2018 22:18 UTC