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SpaceJesus I'm aware of that... that's why I was wondering why you would like carrying it around with you when it's less risky for you to remember it and rattle it off the top of your head.
The social security system is still one highly back dated system in terms of security. To fly into America, I need a biometric passport... to steal a citizen's identity - I need their social security card... then there's so many complaining about illegal aliens.
Change up the system and make it harder for someone else to use random cards they find.