Wouldn't it be utterly badass if, upon encountering a message that scored, say, a 15 or above in SpamAssassin, your MTA could not only tag it with a spam header but could, optionally, fling it back across the internet, with a flaming bag of soggy dogcrap attached, into the face of the sender? Maybe in version 3.0.
It turned out that the worm exploited three or four different holes in the
system. From this, and the fact that we were able to capture and examine
some of the source code, we realized that we were dealing with someone very
sharp, probably not someone here on campus.
— Dr. Richard LeBlanc, associate professor of ICS, in
Georgia Tech’s campus newspaper after the Internet worm.