I actually had people, more often than I could believe, who would put their bare feet up on the wall only about an inch or two away from my face and not remove them when I sat down for takeoff. When I told them they needed to put their feet down they actually demanded to know why. I suppose the fact that it was really disgustingly rude to have your feet in my face wasn't obvious and the fact that if the plane stopped short they would most likely kick me in the face wasn't a factor either. It is amazing how uncouth some Americans are. I NEVER had someone on who was barefoot who wasn't an American. We have some of the nicest people in the world in the U.S. and some of the biggest barbarians as well. Unbelievable.