According to Tubul, his group controls 450,000 "Trojaned" systems, most of them home computers running Windows with high-speed connections. The hacked systems contain special software developed by the Polish group that routes traffic between Internet users and customers' websites through thousands of the hijacked computers. The numerous intermediary systems confound tools such as traceroute, effectively laundering the true location of the website. To utilize the service, customers simply configure their sites to use any of several domain-name system servers controlled by the Polish group, Tubul said.
"Hackers used to detest spammers, but now that spamming has become such a big business, it's suddenly cool to be a spammer," Linford said. He said the junk e-mail business has also recently attracted "engineers who have been laid off or fired, and people who really know what they're doing with networking and DNS."
That's one of those things that is simultaneously fascinating and repugnant, much like a predatory wasp laying eggs inside a paralysed prey or something. (via bOING bOING)