Do our personalities change when we fly?  If you score an upgrade are you suddenly superior to the poor schmuck with the same mileage status who ended up in a middle seat when his earlier flight was cancelled? Watching people on airplanes is always a favorite pastime.  I am always amazed at the levels of cluelessness, arrogance, humanity, panache, obnoxiousness, and just plane rudeness I see on my frequent travels. The following are a few observations I’ve learned to avoid being plane stupid in the sky.