Yes, I also read the article.

I think that ISPs will probably get around to blocking some activity such as automatic port scanning, and maybe doing some virus scanning, if only for their own convenience. And they will doubtless increase their charges as well. I think that it would only be really effective if both ISP and e-mail providers were working together.

I cannot really see them introducing "leper colonies" as that would be too gargantuan a task asdinowuff says:

Just kick the offending PC off the network don't allow any more traffic from the offending nic.
However I do believe that can work at an institutional level which is obviously much smaller. For example I know of corporations that won't let an external or mobile device be connected to their networks unless it has the latest AV and has run a full scan since the update. Similarly, when an infected device is detected it is immediately disconnected from the network.

At the end of the day I think it will create two classes of user...........those paying for a premium service, and those left to fend for themselves.

just a thought