Don't feed the trolls!
Seriously. I know it is tempting, but when you feed them, they just get an appetite for more. I once received a reply from a troll very similar, but much more ignorant. I was really tempted to play with him a little, but restrained myself. These kinds of people (I'm being very generous with that statement) live off of stuff like this. It is what makes them happy. The problem is, they are a little crazy to reply to an ad like that, and you really don't know what kind of person he is other than that he has serious mental issues. He could be a techie type who would be willing to spend all of his spare time finding out who you really are, and then come for you. There are hackers who have enough skills to do serious damage to your life. My advice is to ignore this kind of reply. All you are doing is wasting your own time and giving him something to chew on.
I knew a guy who also liked to feed trolls (I think he was a bit of one himself), and this guy tracked him down and made his life miserable for 10 years. My guy lives near me, and the guy who went after him online lived somewhere in the southern states. So borders are no problem! The guy I know eventually built a case against this guy, but 10 years?! Is it really worth it?