|My usual tactic is to redirect such messages back to the people who
|originated the intercepted message.  That way they either figure out the
|solution themselves or they go to the trouble of asking me about it
|personally.

Excellent advice!  The responder who willy-nilly replies back with the
entire message:

1) uses more bandwidth

2) requires the receiver to then have to "re-process" the original message

3) uses up more archive space

On many REsponses only a "Subject: RE: (original subject)" is needed (but
obviously this just a starting point).

/Pete