Potential Allies or Tinfoil Hatters?

A couple of years ago I had a friend who would talk with me about his displeasure with the governmental status quo just about anytime we got to talk. I trusted him and thought he sounded pretty reasonable. He had told me he had been diagnosed as "paranoid/schizophrenic", but that he really wasn't. My only early warning was when he mentioned that he had an "alien implant". I thought he was joking, and didn't think more of it. Until "the incident".

He had loaned me, without prompting, some money to use to help a family that we both knew. I used it to buy food for them. The next day he asked what I had spent the money on and I told him. He seemed a little agitated. I still had the receipt and I offered it to him. We talked and he started claiming I had tricked him into loaning me the money. I was a little shocked as it had been his idea. Then the real fireworks began. He started saying that I was controlling his mind through his "implant" and that I was a "Martian". I told him that I was pretty certain I was human. He said "Why would you say that? Are you not positive?" I said I was, and he said "That is just what a Martian would say". He became more and more upset. He was talking about being in Army Intelligence back in the early '70s, and that he was still "in", but it was a secret. The more he spoke, the more unreal his claims became. He claimed to be killing people "in high government positions" with mental feedback through his implant. He asked me to kidnap him and a girl he wanted, and take them somewhere they couldn't be tracked. He spoke of the significance of his name and his initials. He said he couldn't "claim to be God". He was getting extremely angry, too. He began pounding his fist on the table and his face was very red. I was trying to just get him calmed down at this point, but everything I did he saw as me trying to use my "Martian thought-control powers" to manipulate him. He did eventually calm down and I got out without harm. I immediately called and warned the girl he wanted me to kidnap with him. He mentioned blowing my head off to mutual friends a few times, but no one else ever saw his bizarre behavior, and downplayed it.

I learned a valuable lesson from this: Not everyone who seems to be in agreement with you, is really on your side. Don't divulge too much too soon. Sometimes you can get a shock even after knowing someone for a few years. Also, beware my awesome "mind control powers".