Why not e-mail [email protected] and ask him, if it does not go against their policy, to expand the header from one of the comments. TJ might claim that anonymity is to be protected even in comments ... and all of that, but he might not care - if he also thinks the guy is an irrational jerk.
If you can get hold of the complete header from any post of his, and find the originating URL, it will probably turn up on Whois.
