I highly suggest that before you start deciding how to proceed, including as to whether you need to find a contact, or if the whois record is sufficient, you talk to a lawyer. A real one. One with at least a bit of internet experience. Of course, this would likely cost you a few hundred dollars, just to talk to them.
DMCA doesn't apply: there is no copy protection scheme that Perlmonks has bypassed, nor is Perlmonks lacking a proper license to redistribute your posts. You cannot rescind your authorisation here any more than you can rescind your authorisation for your local paper to distribute a letter to the editor that you sent in and now regret.
I am not aware of what private personal information that you might refer to, other than your name, but, again, you signed in with that originally. Perlmonks did not go looking for it, you posted it of your own free will. If Perlmonks is somewhere distributing information that you have not personally entered into its database by virtue of submitting it, please share. And note that Perlmonks is also not responsible for the posts of its users, so if some nitwit, not acting on behalf of perlmonks, has posted private information (which I doubt, but I could easily have missed it - I've not been paying attention to most of the drama), that is not something you can sue Perlmonks over.
Further, should you take to trolling, you may want to talk to your lawyer about that as well. After all, that could be construed as harassment, and that is, unlike copyright violation, an actual crime (as opposed to a civil complaint). Again, I don't expect The Powers That Be to respond with their own legal action (unless perhaps it's a countersuit - you really don't want to open that can of worms and then antagonise the situation with trolling, most judges won't look kindly on that, even without a countersuit), instead dealing with trolling as always: through technology. However, your lawyer should advise you to what legal action you open yourself to with your actions, and I suggest you listen to your lawyer.
As always, I Am Not A Lawyer. And, even if I were, I Would Not Be Your Lawyer. Hire one who would be your lawyer, and then listen to them.
Seriously, either shape up and be a productive member of the site, or cut your losses. You're only making things worse for yourself.
DMCA doesn't apply: there is no copy protection scheme that Perlmonks has bypassed
That's a different clause.
The DMCA also obligates service providers (e.g. PerlMonks) to take certain actions on receipt of a request to take down infringing content.
It doesn't apply in this particular case, though.
OK, if you don't remove all damaging content concerning my postings, I'm going to increase said content....oO
The only threat is to your own trail of disgust...so, again, are you alright there, Simon?