Actually not a bad idea, it would be legitimate to get currency replaced if it is known to be destroyed, zero economic effect (same as the way worn out currency is destroyed and replaced).
Exactly, I can’t see why it would be a problem. Even if we don’t actually destroy the money, we just need to SAY we did (an extra $2 million in circulation is a non-issue) and nobody will give it another thought as long as the pirates are dead.