We have had running code for this since early this year, so depending on the date they filed, prior art exists well documented. (blueprints obviously predate running code) Pete Niels Bakker wrote:
http://australianit.news.com.au/articles/0,7204,10394549%5E15306%5E%5Enbv%5E... 2004-08-10 (via InfoAnarchy)
"Pipe has applied for a patent for its method of blocking access to deceptive websites linked to fraudulent emails that direct users to fake bank websites to capture bank account and password details. [..] "Pipe Networks managing director Bevan Slattery said Pipe had been testing a method of enabling banks, ISPs and law enforcement agencies to notify Pipe of new phishing emails. "Pipe could then distribute updated internet routing information to ISPs via the border gateway protocol, so internet users could not reach the fraudulent website."
The implications of this are scary. Hijacking of IP space by a private company, supported by the government?
-- Niels.