Leslie Wu

One of the best places to witness the the breakdown of social norms is an airport boarding line, where all sorts of misbehavior can be observed, even with an on-time flight (toss in delays and the pitchforks come out). 

United Airlines recently added two color codes to its five numbered boarding areas, grouping travelers into blue or green depending on frequent flyer status. Maria Walter, the airline’s managing director of customer insights and innovation told The Washington Post that the new measures have improved boarding time and customer satisfaction metrics.