ID cards containing RFID chips are dangerous: anyone with a simple RFID reader can know people's identity including unique identifiers in the subway without having them to even take out the ID card from their pockets.
If you can't have ID cards and credit cards without RFID, then get a RFID reader and try to disable the RFID chips totally. (don't microwave credit cards as this would disable with conventional chip and magnetic stripe)
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