Coins don't have to do anything, only exchanges AFAIK. What is NY state going to do? Track down all node operators in the world and fine them?
A pertinent question. What is (say) an Estonian going to do when he gets a stern letter from the American regulators...other than flip the bird?
The problem is not for the user , it is for the devs.
Under FinCEN, if the devs are in the US, and they operate a pool, an online wallet, tipping bots, or like AppleByte, a music site - then FinCEN deems them to be a MSB (money services business) and subject to US federal regulations.
Under NY regs, any type of business associated with a digital currency, even simply creating one, makes you subject to the Bit License.
We all thought the regs just applied to the exchanges, but this is not correct under the latest rulings (like the Ripple case). The regs apply to anyone located in the US, who holds coins in custody for another person, that is what makes online wallets, tipping bots, etc fall under the new regs.