He seems to be a bit, how can I put this delicately: "touched."

His fascination with numerology and anagrams and his continual interjection of same indicates to me that he is either suffering from some form of mental issue or that he's a disruptive troll.

My gut tells me he is serious about it, that it mirrors and is part of his (obviously warped) world view.

I mean, I've never met anyone anywhere who says / posts the stuff he does; if something is unprecedented there's usually a good reason.

Bottom line: I've no problem responding to him so long as he is making sense.

If he really is a nutcase, might it not be better to allow him to vent here and get it out of his system as opposed to having whatever it is remain bottled up until he "explodes" and hurts himself or someone else?

Not that I've any "love" for him; as Mr. T said so succinctly: "Pity the fool."