Betty J asked:

Rather than focusing on legitimate deals, such as student discounts or coupons, Douglas talked about ways to trick employees into believing you had already paid for food when you had not. His instructor gave the speech a poor grade because it violated the ethical criteria for public speaking presented in textbooks. The major guideline Douglas violated was:

Be fully prepared for each speech.
Make sure your goals are ethically sound.
Avoid name-calling and other forms of abusive language.
Adapt to your audience’s frame of reference.
Avoid plagiarism.