That's interesting, but irrelevant. You don't fix disgruntled paying customers by humiliating them in front of a crowd.
In what way was he "humiliated"?
Advising a passenger that non-frequent flyers can't board during frequent flyer boarding is NOT humiliation.
What's next? Someone blogging and making someones life living hell just because he was "rude" and "humiliating" by insisting that you need to buy a ticket to watch that movie in the theater?