I have a friend visiting from Europe. He flew in on United from FRA to IAD, and noticed that the C cabin is very bright because, apparently, quite a few people there wanted to read/work/catch the sight of an UFO... I assured him that it is not that we Americans are much less considerate of other passangers who might need to watch a movie or sleep, but that we appreciate the personal freedom that we are granted and want to use it to the full extent!