Related Clues:

• Discussing politics and religion with strangers, often
• Prohibition details
• Double negatives?
• Things to avoid, in rules of behavior
• Cookies and cake, to a dieter
• Sounds like an excuse for not being able to distinguish wines in Prohibition and such like
• No-nos to avoid
• Verboten actions
• Frowned-upon actions
• Forbidden behaviors
• "Tsk" evokers
• Things that are totally unacceptable
• Taboos for a 39-Across
• Things you can't do with child, running around
• Heading on a list of actions to avoid