Your understanding of hypnosis is pretty misguided. It's not nearly as regulated as you say. In fact, many of the certified courses available on the subject are merely self-proclaimed and over-hyped. To my own knowledge, there is no legitimate law saying you need to be certified to perform hypnosis for entertainment. In fact, it is popular knowledge in the hypnosis community, that a certification is nothing more than a piece of paper to show alleged 'feel-good credentials' for potential clients. I know several hypnotists who simply took at-home study courses and proclaimed themselves professionals for the rest of their careers.
I speak from experience as well. I've actually been incorporating hypnosis into my mentalism act pretty steadily in the past year to much success. I can assure you that it's is perfectly legal within the states and much simpler to learn than you would probably expect. There are numerous misconceptions about what hypnosis actually is. Unfortunately, these misconceptions make people believe that it is a dangerous and sensitive practice. With common sense and proper management (like any performance art), the insanely small risk inherent in hypnosis is easily mitigated.
RS.