Unfortunately airl travel nowadays unless you are maybe in first is seen as not very different to catching a train or even a bus..esp as fares can be very cheap.
I dont care if someone is dressed casualy , esp on longhaul. I WOULD PREFER a casually dressed decent person to a drunk or smelly in a suit!
When you look at old movies from the 50's or so, air travel did seem more civilised and luxurious but we are now in 2005 and it is as it is......wonder what it will be like in the future!