If I remember correctly, a similar app was used in Russia by stalkers to find lookalikes to their fancy (public persons, ex-lovers). This app empowers all sorts of creepy behaviour.

I think public access to the images of a person should be vetted by the person in question on a case by case basis, but that would destroy their business model.

Yep, found reference: https://www.theguardian.com/technology/2016/may/17/findface-...

From the linked article:

> Kabakov says the app could revolutionise dating: “If you see someone you like, you can photograph them, find their identity, and then send them a friend request.” The interaction doesn’t always have to involve the rather creepy opening gambit of clandestine street photography, he added: “It also looks for similar people. So you could just upload a photo of a movie star you like, or your ex, and then find 10 girls who look similar to her and send them messages.”