I’d also have to ask “How can we be sure it was wingnuts who created this attack?” The Ars Technica article Charles linked to noted:

Of course, there’s no way of knowing who wrote and posted the tool, which has been mentioned on social media sites. It’s certainly possible that it’s the work of critics of President Obama’s healthcare legislation. But until we learn more, there’s no way to rule out the possibility that it was developed by an Obamacare supporter with the hope of discrediting critics.

For all we know the attack could have come from China, perhaps to conceal a nastier virus or worm installing itself on the attack’s host computers.