Sister Bear
Do some more research about Hypnotism, theres a lot of confusion and misconceptions about it.
During hypnosis the subject is in control at all times, they are fully conscious and recall everything that happened during hypnosis. They will not and can not do anything they dont agree to do. It is just a state of relaxation where the mind is more open to suggestion.
A hypnotist cant FORCE anyone to do ANYTHING they dont want to do. So if someone does something against Halacha under hypnosis they would be responsible.