Mr 42 (or Miss, Mrs, Dr, Col. etc)
Doesn't work. At least not every time. Short while ago I was behind a couple in a queue. Big fat lumps, both of them. Shouting and raving about being asked to pay for their overweight luggage (quite a lot of it). "I've travelled all over the world on every airline. Never been asked to pay a cent before. What sort of crappy airline are you running here?" - etc, ad nauseam.
He and his fat wife were given an upgrade that entitled them to extra kilos so no overweight consideration. They harumphed off towards the gate swearing never to travel with the airline ever again.
I was next in line. Smiled sweetly, handed over the tickets and was told to wait. Good, thunk I, another upgrade.
BUT. A different minion appeared, looking shifty. His good news was that I couldn't get on the flight at all. Overbooked.
Hmmmm...
I got there eventually. In the back.