It happens almost every day. You're walking down a hallway, or a sidewalk, or wherever it is people travel. You see someone about 10 feet ahead of you, someone you see often enough. But you don't know them by name. You make brief eye contact. You go for a smile to just be friendly, but they do what so many people choose to do: they reach into their pocket, pull out their phone, and look with interest as they tap and swipe for a few seconds until they pass you. You turn around to observe what they do after passing you. And every single time, they immediately put their phone away and continue on their commute as if nothing had happened.