You'd not be so opposed to the submission if you were a lot less cynical. I see this as a genuine warning to the community. Nothing more.
With respect to people going off together and starting companies based on "meeting" each other on HN, I'm not cynical about that either, I just have no opinion of it one way or another. It's as if you told me that two people met at a bus stop, fell in love, got married, but one had an affair and now they are in a bitter custody dispute. I feel very sorry things didn't work out for them, but as far as the bus stop is concerned, my interest is in when the next bus arrives, and I think the interior of the shelter should be devoted to the schedule, not to their story.
All I am saying is that there are established places for entrepreneurs to meet each other for the purpose of doing business, and such places have mechanisms for resolving and/or publicizing such disputes.
p.s. That being said... Perhaps this is a one-time thing and will blow over. Unless the front page starts picking up a few stories like this a day, HN is not in any danger of losing its focus, so I don't have anything really to worry about. Carry on!
If someone can help lrm242 great, but I don't think anyone else has delusions that HN is anything but an open forum on the web and therefore entails the most basic precautions.
There are thousands of other bad-actors waiting even if you manage to round up a posse to track this guy down.
So lrm242 has my sympathies but this is definitely a personal problem because making any assumptions based on the fact that someone entered news.ycombinator.com into their address bar (which is the only barrier to membership) is frankly, stupid.