I read that Facebook was using the PII disclosed for the purpose of so-called "2FA" for targeted advertising purposes. https://gizmodo.com/facebook-is-giving-a

I read that Facebook was using the PII disclosed for the purpose of so-called "2FA" for targeted advertising purposes. https://gizmodo.com/facebook-is-giving-advertisers-access-to-your-shadow-co-1828476051 https://gizmodo.com/facebook-is-giving-advertisers-access-to... The paper from website of CS Prof. Alan Mislove: https://mislove.org/publications/PII-PETS.pdf https://mislove.org/publications/PII-PETS.pdf Are HN readers concerned about having to disclose more and more PII to advertising companies in order to be "authenticated"? Recently I heard someone being interveiwed on the radio who studies internet privacy and he was talking about this type of authentication. He was arguing it is problematic for privacy in that it requires the authenticating party to always have "one more" item of PII. He suggested that the PII disclosure requirements would only keep esacalating and eroding privacy until the user has to "jump through her phone" to prove she is who she says. I would provide a reference but I did not get his name. Maybe this sounds familiar to someone? Who knows, maybe he reads HN.