A sign on the wall reads, "Follow the Rules, Please Refrain from Disturbing Residents with Noise." As the scene shifts, a group of elderly ladies is shown dancing to loud music blaring from a speaker.

U.S. law is very strict on “No Smoking” signs in planes even though it banned smoking on all planes in 2000. After causing a stir by mysteriously grounding its new Airbus A321neo planes on ...