Hey guys, this is a heads-up about Karl Denninger's new clean-news
system. I haven't seen any posts on this list about it. His message
describing the implementation is attached below, posted "publicly" on
chi.internet.
Hold on to your news servers -- Karl is about to send out cancel
messages, cancelling _every_ Usenet binary that is not PGP-signed by
someone registered with his system.
Karl says that these cancels will only go out to people he explicitly
peers with, and not Usenet at large. He then adds that what these peers
do with the cancel msgs is their own business.
Folks, the goal is good, but the implementation is bad.
These cancel msgs will leak out to Usenet at large. History proves
this; leaking of bofh.*, clari.*, etc. occurs all the time despite
peoples' best efforts.
And when these cancels leak, every news server on Usenet will
* suddenly be receiving _thousands_ of additional cancels, and
* 99.9999% of the porn out there will disappear from your servers.
I do not want to be handling the support calls when this occurs.
If you are interested in this issue, there is a discussion (amongst all
the noise) on news.admin.net-abuse.usenet, thread "Karl Denninger loses
his marbles..."
Or ask me, I'm more than happy to outline the technical ramifications of
this, and why it's a bad idea, in more detail. I tried to debate this
with Karl, but he went off into k00k land and starting turning every
technical point into a free speech debate. 
If he doesn't want to
talk about the issues, fine...
Jeff
(news admin/consultant for many years)