Generally the benefits of this technique far outweigh the risks. Many of you know that Tom owned an entertainment company that custom designed practical jokes. You can learn the techniques he used to go from the struggle of 4 or 5 jobs per day to the luxury of high paying speeches. A 1.5 hour consultation with Tom will tell you how to get there. A wonderful communication device, that keynote presentation is.
Audiences are very perceptive.
They also know when the presenter is just giving a book report, having spent a little time in preparation to learn about the high points of the topic presented. When you are the keynoter, your audience ought to sense that you are not just a gallon of water, but, rather, a fountain of knowledge. We liked hearing stories read to us as children. But our audiences are adults. They want to experience what is in your heart and in your mind.