Remember the classic board game "Guess who"? This is a Facebook version where they propose that you answer disturbing questions about mutual friends, like "are they in a healthy relationship" or "are they gay".

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Find anyone on the popular Russian social network VKontakte, simply by taking a picture of their face. Already the app has lead to problems with stalking and vigilantism. The city of Moscow wants to integrate it into all of their security cameras.

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