Stage hypnosis can be fun. The people who attend them and volunteer to be hypnotized want to be part of the fun. If one notices, the hypnotist calls up anyone who wants to participate onto the stage. He then does some undetected testing. Those he feels will not allow themselves to go into hypnosis are then sent back to their seats. Be aware, however, that
none of the participants would do anything in hypnosis against their moral value system even if (in rare circumstances) the hypnotist would attempt to do so. Almost all stage hypnotists have their own moral compass that they work within. Of course, he also enjoys the showmanship and acknowledgement.