Fortunately for Mr. Krebs, he got a threat about this several months ago and informed law enforcement that this might happen, so the situation was resolved with a few phone calls. The next person they do this to might not get a warning.
I thought it was bad that I was put on someone's list for complaining about spam in a public forum, but this takes the cake.
Now the real question is: will the FBI decide to investigate this or will it all get swept under the rug? In any sane world, a coordinated attack like this should produce a swift and strong response against the guilty party. But the world is anything but sane.