I would welcome receiving a notice from my ISP if it noticed traffic consistant with botnet infection. I would expect the cost of such monitoring to be included in my monthly service charge (just as I am already paying for whatever security measures they currently employ). But I believe the cost should be shared by the ISP, as it seems that Internet security is as important to ISPs as it is to users. The ISPs could charge an extra fee for "premium" antiviral services, similiar to various others currently available on-line.

ISPs should be able to drop customers who do not remove netbots.

It is amazing how many people falsely believe their computers are not infected, especially now with faster, dual- and quad-core processors, and larger amounts of RAM and bandwidth. Reminds me of the time I drove my car on the freeway for about twenty miles without realizing that my parking brake was engaged.