"Talking during performances, singing aloud - except where sanctioned - unwrapping candy and cough drops" were equally likely to cause annoyance, he said.

BBC: New York bans mobiles in theatres

Jeffrey Olson, a spokesman for the National Park Service, said that normally, if a visitor drops so much as a candy wrapper, he will pick it up immediately or be prodded by others to do so.

WSJ: Outbreak of Graffiti Defaces a Beauty Spot

With light rain as my only company, I walked through Paris until I reached the famous pyramid, splashed with water nymphs in the form of diamond-coloured drops, surrounded by Japanese tourists holding candy-coloured umbrellas.

BBC: The bloom of cancer