http://www.coindesk.com/senators-call-d ... ring-bill/
A new bill was filed from two US Senators which calls for tighter regulation around digital currency, how it is treated for taxes, it's use in money laundering, and proposing greater authority to require digital currencies exceeding $10,000 be declared when one crosses a US border.
This could have larger implications for bitcoin mixing agencies.
Further, it could make traveling to/from with a cold wallet (something recognizable like Trezor) more difficult. Which in turn makes online wallets more advantageous if one needs to travel with their cold wallet and doesn't want to have the risk of seizure of the bitcoin if it's loaded and is confiscated by US authorities.
Could anyone using a bitcoin mixing agency be subject to scrutiny, even if they aren't involved in criminal activity?