The short answer to the question is NO! You do not lose control in hypnosis since all hypnosis is self-hypnosis, so that anything you would do in the waking state you would also do in the hypnotic state. There has been some TV-shows that wanted to find out if you could hypnotize someone to make a bank robbery. Sadly enough they often come to the conclusion that it's possible to hypnotize someone to commit a bank robbery. Sadly, because they misunderstand the state of mind you are in. If the hypnotized person has any idea that the setting is false, that they are not going to commit an actual bank robbery, they are most likely to follow the suggestions. Think of it this way: If hypnotists could actually hypnotize anyone to do anything they wanted, we wouldn't have crime, since it would be easier to hypnotize them than to put them in prison, but that's just not the case!

In his book "Hypnotherapy" Dave Elmans conducts experiments that are somewhat similar. After inducing a very deep state of trance (called the hypnotic coma by Dave Elman) he - along with the members of the audience - discuss how they should try and wake him up. Someone suggests that they yell "FIRE!", but this has no effect on the subject. They even light a match and put it between his fingers, but he just drops it on the floor when the flame gets too close to his fingertips. After Elman has woken up the subject, he interviews him about his experience. The subject tells him that he was aware that they would yell fire, even though there weren't any fire, therefore he didn't find it necessary to react. On the question of why he dropped the match instead of waking up to put it out, he responded that he knew the floors couldn't be damaged by a burning match.

The only way I imagine someone could be hypnotized to do something they wouldn't want to, is if they believe that the hypnotist has this power and possibly that the thing he wants them to do, doesn't go against core beliefs of greater importance than the belief about the hypnotist. But if you have this kind of belief, don't get hypnotized. The answer to the question is: Even though TV shows have shown people acting out "fake robberies" I would contradict their findings, you cannot be hypnotized to commit a bank robbery.