The Register, a UK-based IT webzine, notes:
Talk to anyone who makes a living sniffing out online fraud, and you’ll hear the same story over and over. Researcher uncovers the source of a massive amount of spam, identifies an IP address that is part of a botnet or stumbles upon a phishing site that’s spoofing a trusted online brand. Researcher dutifully reports the incident to the internet service provider whose network is being used, only to find the bad behavior continues unabated for days, weeks and even months.
The article goes on to say:
Because almost all spam is generated by bot-infected PCs, the rankings are a strong indication that those networks are home to a large number of zombies under the control of criminal gangs. Comcast and Road Runner declined to comment. Verizon turned down requests for an interview with a security engineer, but a spokeswoman said officials are aware of the rankings and are working to put new measures in place by the end of the year to curb the spam flowing out of its network. “We are concerned about it,” the spokeswoman, Bobbi Hensen, said. “We don’t like spam. We are aggressively working on that.”
What a joke!