I would also like to know about this.. . I'll watch this thread for a while for answers . . I've been doing it for quite some time now without any problems. Same reasons you mentioned.I would guess that if they found any secondary evidence (shipping , confiscated package, etc ). They would us your banking bitcoin as the nail in the coffin to link you to the crime.I guess there would be a limt on what the law is willing to spend on a case to investigate it. If your buys are small then you wouldn't be worth the cost to investigate and hand out warrants to banks and exchanges.*****important:The US and other countries are working on legislation and laws for bit coins as we speak. Some new rules would be that exchanges have to keep records of all coin purchases and who bought them and ask for ID.  The law will have access to this information as well as the tax man. My fear is that past data and records on file from exchanges and banks will become a part of the new legation and reveal all your past sr purchases.   Yikes.For sure though, bit coins will be treated like stocks and require some ID at some point. We are all at the mercy of whatever these new laws will become. Yu can bet governments will just pass bit coin laws to quietly shut SAr down. It's cheaper and easier this way. Why call the DEA to investigate when you can create restrictions around bit coins in your country? G5 nations will be the first to have las around bit coins. The. There will be safe haven nations that still allow free trading of coins like Cayman Islands sort of thing. Then scams galore as people struggle to locate bit coins over seas . More fees too.Mark my words. Bit coins are becoming regulated.