well i give it a tought and i think this adds nothing special to gov to worry about,
if they were about to prevent possibility of US or any fiat to be used without their watch they should stop bitcoin in the first place,
like what is forbidding me to buy some btc in A sell at B and have de facto my USD tranfered to the other end of the world...

this thing just makes sure you dont suffer any price change while you do the whole buy move sell thing...
i think i'll give it a shot