Who determines what is a "bad" product? One can consider cigarettes, which are pretty clearly bad for you, and they're an easy target; but Marketing Professor Kirk Davidson added gambling and pornography to his list [of bad products] in his book on "sin" products. s a marketer for Caesar's Palace casino in Las Vegas behaving unethically? What is an example of any common product or service other than tobacco, alcohol, gambling or pornography that would be hard for an honest person to market?