Now there's FindClone instead. And I would consider finding somebody's identity by matching a photo of them with a database of VK profile pictures a privacy nightmare. I don't know If they got the pictures via an API or scraping, but it shows what can be done with easy access to this kind of data. People used FindFace to deanonymize porn actresses and out them to family for instance.

https://towardsdatascience.com/steeling-faces-for-investigat...

https://nakedsecurity.sophos.com/2016/05/02/facial-recogniti...