There are people who just don't deserve to be alive. Responding to spammers is stupid, but dragging thousands of other recipients into it makes it a capital offense. A recent email to the debian-security list supports my assertion:
Subject: Re: Sell Your Organs Online! From: "kwd" <email@example.com> Date: Thu, 23 Feb 2006 17:57:20 -0700 (Fri 10:57 EST) To: <firstname.lastname@example.org> Cc: <email@example.com> so what's this all about? get back to me with a list of what's worth what.
"Brain: $0.1 (as yours is too small)
Fat and skin: $0.5/kg (let's make some soap, shall we?)
Eyes: $10/pair (please gouge them out with a clean teaspoon only and pack them in dry ice straight away before couriering them over.)"