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