That is always a concern. When you are doing stage hypnosis, you are hypnotizing the entire audience, not just the volunteers.
I have several friends that are stage hypnotists. I hear the stories from them.
While they say, “You won’t do anything under hypnosis that you would not do otherwise” , it’s a lie. It’s merely said to decrease resistance.
Children are in a hypnotic state all the time prior to age 8.
I’ve done a fair amount of hypnosis with children. It can be life changing.
I did it with children who were suicidal to identify the root cause, and it really got profound results many times.
Children can walk, talk, have eyes open and still be in a trance.