"Back In The Day," people used to dress up to fly. Those were the days when people also dressed to go to see a movie. Now I usually get stuck sitting next to some fat, smelly guy in a sleeveless t-shirt, shorts and flip flops...in both places.
Our older son has figured out that the better he looks, the less likely he is to be pulled out of line. He shows up in a full suit, with pocket watch... and a backpack for a suitcase.
My mother-in-law, on the other hand, was always picked out by their "auntie-terrorist" squad. (She stays home now.)