That could be a problem. It could also be something to make the use of Bitcoins in America illegal. Certainly the U.S. government is very interested in "paper trails" and keeping track of where money came from and where it is going, where even cash transactions have to be reported on some level. This move simply adds that issue all that more.
The government just don't like competing currencies or anything that threaten their monopolies, period. If you set up a country 50 miles away from shoreline of America, they will find a reason to bomb/invade/murder/etc the island to oblivion.