what's been going on..
"But it wasn't the context of the messages that had some observers troubled. Rather, it was the method by which they were transmitted: through spam zombies.
Zombies are personal computers that have been infected with a virus that allows spammers to control them from a remote location for the purposes of sending out mass quantities of spam. These infected machines allow spammers to send much more e-mail than they could with their own e-mail server. It also makes it harder for authorities to trace the source of the messages."