> If the Government wanted to destroy BTC it should be trivial for the NSA to take over 51%+ of the network which then allows it to pollute the system with malicious data that would eventually kill it.
That's not how bitcoin works.
If you control 51% of the mining network (not a trivial feat, as you seem to think it is), the best you can do is either:
a) reverse your own otherwise valid tranactions (presumably the government doesn't care about defrauding its citizens -- it can do that without resorting to bitcoin hacks), or
b) slightly slow the effective transaction acceptance rate by only accepting your own (garbage but legitimate-looking) transactions. This would have to be done in some inconspicuous way such that the client authors can't reliably filter out your transaction spam with a clustering algorithm, or else a client update that rejects your spammy block chains would completely nullify the attack.
I don't see how either would "kill" bitcoin, or even have much of an impact.
That's not how bitcoin works.
If you control 51% of the mining network (not a trivial feat, as you seem to think it is), the best you can do is either:
a) reverse your own otherwise valid tranactions (presumably the government doesn't care about defrauding its citizens -- it can do that without resorting to bitcoin hacks), or
b) slightly slow the effective transaction acceptance rate by only accepting your own (garbage but legitimate-looking) transactions. This would have to be done in some inconspicuous way such that the client authors can't reliably filter out your transaction spam with a clustering algorithm, or else a client update that rejects your spammy block chains would completely nullify the attack.
I don't see how either would "kill" bitcoin, or even have much of an impact.