Like most social media, FourSquare is designed to connect people, but what if you feel like being alone?
Spotted by The Verge, Hell is Other People is a web app that takes your friends check-in data from your FourSquare account, and calculates what the creator calls "optimally distanced locations" to make sure that you don't bump into any of them.
Of course, the success rate depends on just how dedicated you and your friends are to FourSquare. You might have more success by calling in sick, closing the blinds and pretending not to be home.
But Hell is Other People was designed more as an art project than a functional app, and in those terms it works just fine.