I've had a blinding flash of inspiration!

I use a wheelchair. Like a lot of people, I switch shoes for thick socks on the airplane because my feet swell. It's difficult to get my shoes on and off, both at the checkpoint and on the plane.

So why wear shoes at all? Propriety, I guess - well, and protecting my feet from banging in to something, but that doesn't happen often. I think I'm not going to wear shoes at all on my next trip, just put 'em in my bag.

Maybe they'll make me put my socks through the x-ray.