The 10 Year Challenge has gone Viral and everyone is participating.  It's so cool, fun and engaging, right?  Some are claiming the pics are being used by Facebook to

"mine data to train facial recognition algorithms on age progression and age recognition"

Wired 
People.com article:

“Imagine that you wanted to train a facial recognition algorithm on age-related characteristics and, more specifically, on age progression (e.g., how people are likely to look as they get older)."

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