- Bitcoin can be controlled. It is just like cash, subject to regulation as any other. See any large exchange for their AML policy. There is no reason Bitcoin can't be controlled.
- Bitcoin does not need to be controlled. There is no harm that can be done with Bitcoin. Buying drugs and evading taxes with Bitcoin are just as, if not more, dangerous and easy to detect as with cold, hard, cash.
- Control is not necessarily a good thing. There are many things that should not be controlled. That's why we have freedom of thought, conscience, expression, and association. People are not afraid of them. Like thought, conscience, and expression, financial freedom is beneficial, not detrimental, to society as a whole. Bitcoin decentralizes the banks, which have done little good for society. People fear banks, and Bitcoin helps save the day.
And I agree with you 100%. But that doesn't mean our opinions match with the majority. I believe it is a legitimate concern to be worried about how the government may react to bitcoin. They could easily convince banks to stop transfers to mtgox just like they did with wikileaks. Two US senators already have a negative opinion of bitcoin. France is trying to restrict cash transactions.
I really hope you are right that my fears are irrational. A government attempt to stop bitcoin would definitely set it back a few years if not more. Regardless, I'm in it for the long haul & believe even a government crackdown won't stop it. And maybe others will find a way to lessen the effects of this hopefully worse case scenario.