1) There should be an upper limit to the number of groups
cross-posted to (say, three?)
2) The geoplanerians should be excluded by the charter.
3) Anonymous posting should be forbidden
4) I cannot imagine a moderator who would be suitable
to all a.p.o participants.  However, the simple rules above
could be implemented in software, and would exclude
90% or more of the noise on a.p.o.  Sort of like a group-
wide kill-file.