But what good would be alerting the common person that they are infected? Most modern malware comes coupled with a rootkit of some sort that subverts AV protection so just running AV would be out of the question. Asking a standard user to reformat their own machine is also out of the question as most users aren't comfortable with that. So basically I feel that you would have to relinquish control of your machine to the ISP for any type of effective treatment to take place. Not that I agree with such big brother antics.