> Then the US government smash down your door and throw you in federal prison because you're actively working to help North Korea.
Not a real issue because transactions are not associated with IPs. There's basically no way to know the country of a sender or recipient. Also, it was ruled that virtual currency miners are not subject to AML regulations[0].
[0] https://www.fincen.gov/sites/default/files/news_release/2014...