Ronald Thompson wrote:

Of course "CLIFF" and "TT" are at the head of the list, as well.

It doesn't completely eliminate them because there is always
someone who just has to reply to them.

For someone who's serious about using a kill file instead of just
using it as an excuse to troll, a newsreader like Xnews can filter a
thread branch (instead of just a single post) and that neatly solves
the problem of others replying to someone who is in a kill file.

But we're talking about massive amounts of spam here.