Comment by klausa

How is this techically possible? I was under impression that foursquare doesn't share your full public profile (including your twitter and/or facebook) when you show up in 'x is also here:'. I get it how it can look up girls that are nearby (scan for nearby 4sq venues, than if there are people in them, filter for girls...), but how can it link back to Facebook (unless you're friends with that person on 4sq and/or facebook, which makes whole point of this app moot)?