That was the biggest part of the discussion on this video elsewhere. You know if someone doesn't wash their hands after using a public restroom, they probably don't EVER wash their hands.
I put several of my kids' pictures through it. For one, it guessed 16 to 20 (she's 18). The other, it guessed 34 to 63 (she's 16). You'd think the braces would be a giveaway.