Similar in scope to the (now defunct) screensaver created by Lycos that targeted spam sites, the newly-released Mugu Marauder is intended to take fraudulent bank sites off the air by sponging up their bandwidth. Mugu Marauder can be downloaded at
www.aa419.org/mm/ It's currently only available for Windows, though a Linux port is allegedly in the works.
I am running it now! Download it
here Great use for that big fat 3-5 megabit Comcast line.