I can appreciate your concern about the possible misuse of hypnosis. I did some hypnosis work for self-help when I was 20 and it can be a powerful technique for focusing your intent. However, I suspect but don’t have any evidence that hypnosis could be used to create false memories. My only suggestion based upon that limited personal experience is that if hypnosis is going to be tried to access memories, it should be done with a reputable practitioner who knows the exact intent/goal. In my own hypnoidal mediations I certainly used visualizations that caused me some confusion during my waking hours for most of a two week period. I was able to easily undo the effects once I recognized what I had done. No long lasting effects came from that. But it taught me to be more specific, more clear about what I visualize during meditation.