Possible Clues:

• It should get nixed
• "I wouldn't"
• 'Uh-uh!'
• Darwin Awardee's downfall?
• Hardly encouraging words
• "Do not do that!"
• 'Don't even think about it'
• “I wouldn’t do that if I were you”
• 'Don't even go there ...'
• 'No, you don't want to do that'