There are several things you can do to them. First, you wait until they're done yacking. Then, in a baby voice, say "my diaper's dirty." Second, you can ask "What's your favorite color?" They say *insert color here* You scream, "WRONG ANSWER!" and hang up Third, you can say, "I will buy this if you answer the following 20 questions." Let them answer the first 19 correctly, then give them an impossible on for the 20th. When they get it wrong, tell them so and hang up.