4 ms·Facebook once suggested I friend my dentist. We've never had any online correspondence.by gweinberg 9y agoFacebook once suggested I friend my dentist. We've never had any online correspondence.nickelbox 9y agoDoes your dentist have free WiFi?takeda 9y agoHa! That's genius, using WiFi BSSID to find people who are in close proximity. Actually one doesn't even need to sign in to it.