I can't imagine any intelligence professional wasting her time reading the crap at times coming over this list.

As of mid 2000 most of traffic is recorded. By this time 'most' is very close to 'all'. But if you e-mail someone with account on the same local ISP, using dial-in at the recipient is also using dial-in, and ISP didn't farm-out dial-in access, then your message may not be backed up forever.