Another list question

[Sean McMahon]

someone from another mailing list I'm on warned me to not quote the full email
addresses of people when I send mail to the list.  This individual stated that
spammers use addresses from list archives to spam people.  Is this a real
problem and is there information on how to properly filter address display for
lists in mutt or pine?  Obviously,  something would have to show up in the
headers of a message for the mail to be sent.