Greylisting and new posters

[Mel Flynn]

All (including David with his kick-ass postmaster hat),

while off-topic, flames and other non sense covered by Freedom of Speech are 
an annoyance to many, I'm more bothered by some newcomers to the list that are 
being greylisted on first post and instantly hit the resend button. Especially 
since a technical solution is possible in 90% of the cases (there are a few 
people that don't resend, but re-edit).

Is it possible to:
a) Put a big-red-blink-popup-attentiongrabbing monster text into the 
subscription page about first posts being delayed with a link to greylisting?
b) Hash the bodies of greylisted messages and reject / discard if the same 
body with a different msg id is being received?

I'd be happy to contribute to b) if it is thought that the incoming mailer can 
handle the hashing and storage of this information.
-- 
Mel