Hate everyone? Me too. A new app called Cloak uses information from Foursquare and Instagram to map out where your contacts (who use those two applications) are. You can download the app for free on iOS devices and use the map to avoid people you borrowed fondue sets from and don't ever want to see again. You can even turn on notifications for when people come within a pre-set radius.
The Cloak app was made by designer Brian Moore and former BuzzFeed creative director Chris Baker. Baker is the same dude responsible for Hate With Friends, an app that lets you know which of your Facebook contacts you hate also hate you. I suggest you give these unfriendly apps a whirl and then don't tell me about your experience in the comments section.