Southwest Airlines CEO Gary Kelly on passenger turbulence: 'I am worried our broader society is less civilized'

Domestic airlines have been in the spotlight for the past few weeks based on their treatment of customers, starting with United Airlines booting passengers off a flight, followed by an American Airlines (NASDAQ: AAL) flight attendant getting into a spat with a mother, and Delta Airlines kicking off a family, just to name a few.Though Southwest Airlines' (NYSE: LUV) customer service hasn't been the subject of viral videos caught on smartphones, it was cause for concern at the annual shareholders&