We have all driven by cars that have multiple flags attached to their windows, whipping away in the wind, showing you what team their drivers’ support. We often see car dealers, stick huge, colorful flutter flags into the ground, flapping about as they display the latest deals, and grabbing your attention as your car whizzes by. These advertising tactics might seem a bit extreme, but since you did glance at them, they did their job, right? The truth is that flags have been used for centuries to commemorate and promote events, signify landmarks, and most commonly, to identify a particular…