I used to be the kind of guy who would yell at customer service representatives on the phone. I would call up my bank, or my airline, and scream at the person on the other end as if it were his fault that I had accidentally paid my electric bill too early, thus insuring the account had insufficient funds for the next 4 visits to Starbucks. I don’t think I ever ended one of those conversations without threatening to never, ever do business with that company again. I’m sure Delta was quaking in their boots thinking about losing the $389 in ticket sales I generate for them once a year. But somehow, they survived.