They didn't even bother removing "Federal Bureau of Investigation" from the organization field on the "self-signed" SSL certificate. I'm not sure if I should feel flattered that I'm on the FBI radar for people of "skill" or insulted that they think I'd actually bite on something as low/primitive as darkode.
Are they looking for scraps? Or is this just entrapment to look good on the news? What I know is that they really need to step up their game if they want to get to the serious bunch.
http://i.imgur.com/3znIw4L.jpg
In general I suspect that self signed certificate is a joke in bad taste. What I'd be far more concerned about is their poor use of the SSL system, in the sense that they could and should have created their own CA and attached the CA's signing certificate to the e-mail, so the web-site (to known users) would have appeared correctly signed and would have made it slightly harder for law enforcement to intercept.
As is law enforcement can just catch and release traffic (MITM), re-sign it with their own self-signed certificate and nobody would be the wiser...
Plus, if you really want to be amused then I suggest you check out the FBI's real SSL certificate on their web-site:
https://www.fbi.gov/