From Newsgroup: uk.telecom.mobile


the universal "ignore" filter automatically demotes/flags all articles
in all newsgroups, allowing only those articles, contributors, servers, topics, etc., which have been previously whitelisted, i.e. "unignored", "promoted", "watched", "highlighted", "kept", etc., primarily based on
text strings in overview headers, e.g. "message-id *@server001*, which are added/modified/deleted at the user's discretion . . . it's similar
to whitelisting phone calls, so only preapproved caller id numbers may
ring through to your phone and ignored caller ids still appear without ringing . . . usenet's call-blocking app is the global "ignore" filter

the chronic usenet offenders, primary and secondary troll aliases, are killfiled, and the unfamiliar troll aliases, tertiary, ephemeral, will
remain buried in collapsed threads pending routine purges (e.g. daily),
so no matter how may umpteen times per day/per newsgroup(s) they morph
their headers, they cannot circumvent usenet's newsreader call-blocker

the "ignore" filter is easily activated in any newsreader, e.g., using
forte agent, to set filter expression "author: *", kill action "ignore thread", scope "global", priority "100" . . . then "unignore"(unblock) articles selectively, while automatically ignoring usenet's minions of predators (trollfarm, usenet's commission-only telemarketing chatbots)

most usenet newsgroups subscribers (mainly lurkers, some contributors) probably have a hundred or more "killfile" entries that greatly reduce visible newsgroup activity, making it easier to further whitelist some articles, while blacklisting a few more of gazillions of troll aliases
(some newsgroups may attract fewer trolls than others...caveat emptor),
and filtering by newsgroup sections, hierarchies, e.g. [news.*], using asterisks to shorten entries without oversimplifying, e.g. from *abcd*,
and beware insidious troll farm tactics, e.g., replies to known trolls
are almost always from other troll puppets but not always, and this is
where whitelisting prevents inadvertent filters, "guilt by association"

--- Synchronet 3.22a-Linux NewsLink 1.2