Not a conspiracy theory *site* per se. Not a site at all really, just the archive of a newsgroup. In principle no different than Free Republic, although without the nice GUI. Sort of like a mailing list, only different in implementation, newsgroups were originally created, well before the advent of browsers and the world wide web, to allow scientists to communicate and discuss mutual interests. I'm not sure if they go all the way back to the old ARPANET, the forerunner of the internet or not. I used newsgroups, including that one or a similar one, for some time before I began using a browser( NCSA Mosaic, upon which Internet explorer is based) and surfing the web. Unfortunatley most of the non scientific, and some of those too, tend to quickly degenerate into flame wars.
It would have been nice if the poster on that newsgroup (misc.activism.militia) would have provided a URL for more information, but unless I missed it, he did not.
I'm not sure if they go all the way back to the old ARPANET, the forerunner of the internet or not. Usenet was conceived of by a couple of grad students as a "poor man's ARPANET" in 1979 and established in 1980.
So yes, it does go back to ARPANET times. It's scary to look at the Google archives of what I posted on Usenet back before the WWW was around! >cringe!<