This reminds me of a run-in we had with a 'nut'. She had looked up the lab on campus and walked in asking for the PI. After some back-and-forth, she mentions that she had been emailing with our PI for a while concerning the government implanted mind-reading device in her brother's brain (I was in a neuro-lab at the time). Without missing a beat, one of the other grad students starts questioning her about the device: when is it active, what is the range, power requirements, etc. She, as a layperson, really has no idea. After some probing about her brother's condition (likely her own condition, but who knows) we get her to accept that the power output of the device would be very tiny and that the government's receivers can't be more than a few meters away at any time. She seemed very satisfied with this conclusion. I think there were some mentions of Faraday cages too that she liked. At the end she mentions that her brother is a schizophrenic but that the medications don't work. Another grad student then took over and started to talk with her about how schizophrenia was thought to behave and the importance of proper medical supervision, but this occurred in another room. After some more time, the 'nut' came back to thank us for talking with her and taking her concerns seriously. She seemed very relieved at the conclusions and was smiling. We never saw her again and I don't think anyone mentioned it to the PI either.