When DNSChanger was spreading, the FBI eventually shut down their command & control servers, which disconnected approximately 300000 computers from the Internet

When DNSChanger was spreading, the FBI eventually shut down their command & control servers, which disconnected approximately 300000 computers from the Internet. Although it was an indirect shutdown of peoples' Internet connections, there wasn't much of an outcry when it happened. If Windows XP gets sufficiently targeted by malware authors using derivative Vista/7 zero-days unlatched in XP, is there a point where it makes more sense to forcefully disconnect WinXP machines from the Internet for the greater health of the Internet?