I don't see why anyone is all upset over this rational security concern of a man simply refusing to do what the nice flight attendant told him to do. And the fact he was a security threat for reading a book about planes on a plane, after going through security and being body scanned. Maybe with that fanny pack and after reading about old single engine bi-planes and being a musician, "folk musician" he could "McGyver" his wallet, a guitar pick and the complementary beverage can into a weapon or a bomb. No, he would need to buy an alcoholic drink use the alcohol and the beverage can, and the guitar pick to make the bomb in his fanny pack. I see the rational behind the flight attendants' actions.
I have flown that airline and dislike it allot. The attendants are always pissy, and short of being henchmen and bullies....not nice people at all.