Perhaps you saw a post this morning on your Facebook feed touting face recognition for "more features." According to the social network, this ability to analyze users' faces–which before only helped users tag photos–is becoming even more widespread.
For background: Facebook has long analyzed biometric data in photographs to make it easier to tag people. In fact, this technology has been the subject of many lawsuits–most of which took place in states like Illinois, which restrict companies' ability to collect and store biometric data without consent. (Facebook did announce last year that it would update its privacy settings to better advertise its face recognition features.)
It seems the purpose of this new Facebook post isn't so much to herald new face-recognition features, but to disclose vital information–namely, that you can opt out of face recognition. After seeing the post, I was surprised to learn my face-recognition setting was on, so I turned it off. Others I talked to say their setting was already off. Either way, this looks an awful lot like Facebook gaining consent from its users to read their face data.