Isn't it time for hoteliers to abandon the archaic practice of slipping paper under a door that doesn't tightly fit at floor level? Hallway noise nearly always appears on the short list of a traveler's hotel room irritants, and it's bad enough that in most rooms there's only a single door between hallway and accommodation. The unnecessary gap between door bottom and floor is the main reason unwanted hallway noise (and light) enters guest rooms. In other construction, this would be considered evidence of poor design or installation.