Comment by closeparen

The problem here is the payments industry (continuing to issue and accept "credit card numbers") and the voters (refusing to authorize a proper national ID). An individual entity that has to conduct business under these circumstances has no real alternative.

You are not being harmed by the storage or leakage of a few bytes, that's ridiculous. You are being harmed by the financial industry and government's insistence that knowledge of these bytes is sufficient to take your property or hold a debt against you.