There was a time when airline travel was an elegant experience. People dressed up. The food was good. And there was enough room between the aisles for reclining seats to make sense. No more. But while semi-formal dress, most food, and spacious aisles have disappeared, those reclining seats are still there crunching knees and putting faces and hairdos entirely too close together. As Dan Kois writes in Slate, it’s time to sit up straight!