[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.
