I run an email list for a hobby of mine that has many, many technically
illiterate subscribers.  I run the list with ecartis and have it
configured to convert html to plain text and strip attachments.  Its saved
me many headaches dealing with the countless AOL and Outlook (aka
Microsoft Virus Server) users.

I also have really tight quoting limits to catch the top posters and will
just strip out the quoted parts of top posted messages in their entirety. 
Haven't had a single "me too!" followed by a copy of the daily digest in
some time.

-- 
Kathryn
http://womensfooty.com