My point is the same one that has lead to all sorts of
assurance systems and exclusions from membership of those who don't meet
specified standards in credit card systems, banking systems, etc. Secure
e-mail should be no different.
This is an IETF working group. The idea is to arrive at a technical
specification for a protocol. The idea is not to tell other folk how
to run their life.
IETF process is like herding cats. The only sure way I know to
get people to do something is to absolutely forbid them to do it.
I don't see how any statement of the sort you propose would be
anything other than be damaging and counter-productive.
In any case both S/MIME and PGP have been ordered by the
IESG to standardize message formats. PKI is the realm of PKIX
and SPKI. I suggest you take this discussion to one of those
groups David, preferably SPKI.