Social media is more popular than ever. Facebook, Google+, Twitter, Instagram, Foursquare and Pinterest each have millions upon millions of users. One of the key similarities of these services is the ability to share your location with family, friends and even people you don’t even know. So what do you do when you’re out and about and you run into one of those people? Do you stay and chat even though you really don’t want to? Do you wish you could have seen them coming so you could avoid them?