Could this constitute the idea of first degree inception? Getting someone to believe a false, or artificial idea (maybe similar to that of when you upload a custom payload), to someone's mind and using that artificially foreign data to trick the victim into believing something. I could see how this could be an ethical issue or delema. However, the usage of implementing artificial concepts to get the user to regurgitate information that was not there or trigger remembering information that they might have forgotten brings up the idea of interrogation. On the flip side it could be used to filter information in patients who experienced trauma and were involved in a crime. Maybe this might be the first step in an alternative to hacking the mind - without electronics, but with memories. Of course it must be voluntary or implemented in an unnoticeable manner.
I find this stuff facinating.