Well there was an app named "NameTag" back in 2014 that promised to find pictures online from a potential match [1], and some russian dude was matching pictures

Well there was an app named "NameTag" back in 2014 that promised to find pictures online from a potential match [1], and some russian dude was matching pictures of strangers in the Moscow metropolitan train with online available pictures (I cannot find the article anymore unfortunately) [1] http://www.ibtimes.com/nametag-facial-recognition-app-checks-if-your-date-sex-offender-should-you-use-it-1539308 http://www.ibtimes.com/nametag-facial-recognition-app-checks...