U.S. airlines have received some well-deserved criticism lately for their routine mistreatment of customers. But maybe it’s time air travelers also look in the mirror to see why so many jetliners have become venues for Mile High cage fights. Those folks might see a reflection of the Ugly American. The whiny American. The entitled American. Just this week, we’ve been treated to a fight night on a plane at Burbank Bob Hope Airport in California that ended with a Southwest Airlines flight attendant buried somewhere in the scrum. At Fort Lauderdale-Hollywood International Airport in Florida, passengers started duking it out...