If the USA just said, "no Bitcion" it would be viewed as a blatant infringement on Constitutional rights regarding the First and Fifth Amendments.
The strategy in the near term isnt to say no to bitcoin. It's to:
A) relegate it to the utility of beanie babies and tulips by making it illegal or at least massively difficult to do any business exchanging btc to and from fiat currencies.
B) hunting down and making very public dramatic arrests of two-bit drug dealers, child pr0n sickos, wanna be money launderers (the pros use dollars and black pesos, or go to HSBC), freedom fighters/terrorists and any and all other "undesirables" they can find that have ever touched a satoshi.
C) Using the global threat of BTC to strengthen the cooperation and information sharing between the legacy banking system. Total financial surveillance is the goal and btc is a great scapegoat.
They seem to be winning big in these areas.
We seem to be bashing our heads against this "last mile" issue of converting btc to and from fiat. I wonder, could we shift some of the attention from btc as a currency and instead focus on btc as a means of exchange. I suspect not. I suspect greed and the general weakness of the human condition will win out. But...
Could we barter services from each other for btc? E-lance/Stack Exchange paid solely in btc?
What if a small cooperative of people doing anything really, but say growing food locally or trying to get their kids to and from school and looked after while parents endure their hours long commute, agreed to use a fixed pool (a fork) of btc to trade responsibilities for duties?
Could some btc philanthropist/early adopter start a volunteer program where by people get paid in btc for doing community service type work? You do some work, earn some btc from that fork, then can pay for stuff you need done with your earnings. Alt coins show that it is almost trivial to create your own fork and then you can use that as a public ledger for any closed community doing just about anything.
Sure, this is all easily dismissed as wishful hippie bullshit. But really, absent something dramatic and probably undesirable like JP Morgan opening an exchange, so much focus on converting to and from fiat is really missing the point and power of btc, IMHO.