Possible Clues:

• Proscribed acts
• Societal proscriptions
• Looking back, graduate swamped by the black stuff produces societal prohibitions
• Societal no-nos
• Section of a foreign travel guide, maybe
• Bans volunteers with drink, reportedly
• Repeatedly Old Bill's covering up unacceptable things
• Many of the Ten Commandments
• Iconoclasts break them
• We won't accept these contemptuous noises, thank you, for a start