scupper writes "Attack of Comcast's Internet zombies By Declan McCullagh
http://news.com.com/2010-1034-5218178.html Comcast's high-speed Internet subscribers have long been rumored to be an unusually persistent source of junk e-mail. Now someone from Comcast is confirming it. We're the biggest spammer on the Internet, network engineer Sean Lutner said at a meeting of an antispam working group in Washington, D.C., last week.

Full story at http://news.com.com/2010-1034-5218178.html."