The interesting thing about this so-called anti-spammer tool is that
because a lot of spam I see comes from dialup accounts (including the
pestilential "bogus subscribe attack"), the most likely person to be
hit by such an "interesting" retaliation is the next guy to dial into
that particular modem.
Think before you resort to force....
BTW, http://www-math.uni-paderborn.de/%7Eaxel/BL/ has a blacklist of
E-mail advertisers (for e-mail address filtering), and
http://spam.abuse.net/spam// used to have a list of IP addresses for
"rogue" nets (those who refused to police their customers), which
has been withdrawn "due to repeated legal threats by sites that were listed