Earlier quoted context omitted.
Problem is he didn't do that critical second step, the "burrowing through emails or checking blog comments" for something that links the IP to a friend. He made the mistake of responding to the criticism of his story's technical implausability by claiming his friend used a procedure of looking up the IP location on a general web database. But those only resolve to ISP-level geolocation, not user-level, as the very po…
I must've missed where he claimed that he didn't do those things? Their specific methods were always suggested to be something "like x" rather than exactly like it. Further, he didn't need a method that worked at identifying all people (as tripped up 90% of people in the linked explanation), just this particular one. I run a forum and often try to identify/discourage PITAs. Sometimes just tracing an IP reveals nothin…
He didn't say his IT wizard did something "like" geolocating the ISP, he said it was "almost identical" to geolocating the ISP.
Furthermore if there were some magical additional steps or wonderous circumstance that did bridge the gap between ISP-level geolocation and personal home address, he has absolutely no reason not to spell them out.
Unless he's lying.
You know, what's really fascinating about this whole thing is not why this guy would fabricate a dramatic story about him confronting a troll. That's easy to understand. It's why some people have such a powerful need to believe it. So much that they bend over backwards to find some exotic explanation around all the holes, rather than seeing them for what they are.