Because all the exchanges they'd use are regulated in some form and at least adhere to anti-moneylaundering-directives and boycotts, or they can't operate in the US and/or EU.
Sure, they could move to p2p exchanges or exchanges in unregulated jurisdictions, but that requires quite some effort and thought. Which, by definition, would exclude them from being "idiots".
Because all the exchanges they'd use are regulated in some form and at least adhere to anti-moneylaundering-directives and boycotts, or they can't operate in the US and/or EU.
Sure, they could move to p2p exchanges or exchanges in unregulated jurisdictions, but that requires quite some effort and thought. Which, by definition, would exclude them from being "idiots".