That said, a lot of these "solutions" that people are coming up with just end up getting closer and closer to what the DNS already accomplishes.
The worst case scenario here is just a fragmented DNS, and the US losing control of the .com TLD. The "doomsday" scenario here is that DNS servers stop trusting the root servers, and don't take updates from them.
This is a gigantic headache for network and system administrators. It is not the end of the internet.
If you guys really really care that much, here: http://www.verisigninc.com/en_US/products-and-services/domai...
Apply for access to the .com zone files, download them, and up your own DNS servers. Don't accept any updates from anybody ever and you'll have a much, much, much more complete, much more "you can query this as a daemon" version of these silly lists.