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You can argue all day about whether the 2nd amendment should be in place. It's a lot harder to argue about the intent. The founding fathers thought a free people should be armed.
http://www.buckeyefirearms.org...
"Proof of work in bitcoin is not really any proof of work either because it's just a guessing game" -- it seems you don't understand proof of work. If you don't do the work to guess, you don't get the right answer very many times.
You can't establish value in a distributed fashion any better than with proof of work (that we know of right now). For a stupid alternative, look at ppcoin, which plans to eventually rely on "proof of stake" but currently relies primarily on proof of work.
This attack would be very, very difficult to achieve. Doesn't seem very worrying and I'm sure it'll be fixed well before it becomes an issue. There are already some pretty good discussions on/r/Bitcoin/ covering why it's not as big a deal as the sensational headline here makes it out to be.