I'm Pieter Hintjens, and I'm here to discuss psychopaths and other stuff, AMA!
My short bio: I'm a programmer and author of a few different books. My last book, The Psychopath Code, explains psychopaths. I've tried to keep it pragmatic and clean: what makes a person a psychopath, how this works, and how to deal with it (for the rest of us). The book is a handbook, not a medical text. Oh, and I just rage-quit Twitter.
OK, thanks for the questions, it's been a fun many hours. For those who hate me for writing the book, shrug, have a nice day anyhow!
My Proof: http://hintjens.com/ (with link back to this IAmA)