[Usenet] The newsgroups news.admin.net-abuse.*, devoted to
fighting spam and network abuse. Each
individual newsgroup is often referred to by adding a letter to
NANA. For example, NANAU would refer to
news.admin.net-abuse.usenet.
When spam began to be a serious problem around 1995, and a
loose network of anti-spammers formed to combat it, spammers
immediately accused them of being the backbone cabal, or the Cabal reborn.
Though this was not true, spam-fighters ironically accepted the
label and the tag line "There is No Cabal" reappeared (later, and
now commonly, abbreviated to "TINC"). Nowadays "the Cabal" is
generally understood to refer to the NANA regulars.