I would really like to see mailing lists starting to distribute
*only* PGP-signed messages, with PGP key published in a keyserver
with appropriate credentials. There already are mailers which call
PGP automatically, so the user is not required to type something
like ~| pgp -fsat every time.
This is not a high magic. This is a matter of three lines of code,
and some patience of the list maintainer.
It is also good as it will proliferate good encryption software, and
teach people how to protect themselves.
- --vadim