It's easy to imagine how we could make something worse than "Girls Around Me"—something much worse. Facebook encourages us to disclose a wide range of information about ourselves, including our religion and a photograph. Religion is obvious: "Yids Among Us" would obviously be one of the go-to tools of choice for Neo-Nazis. As for skin colour, ethnicity identification from face images is out there already. Want to go queer bashing? There's an algorithm out there for guessing sexual orientation based on the network graph of the target's facebook friends. It's probably possible to apply this sort of data mining exercise to determine whether a woman has had an abortion or is pro-choice.

...

But as I said earlier, the app is not the problem. The problem is the deployment by profit-oriented corporations of behavioural psychology techniques to induce people to over-share information which can then be aggregated and disclosed to third parties for targeted marketing purposes.