INTERESTING:Make meaningless pins, and passwords, self-referential

Lesson Learned: Casino loyalty card need a pin that one can remember. Use the card number!

Those casino loyalty card are really meaningless. I’m not sure if the staff can see the pin, but under no circumstances should you use your bank pin. Or, one used with anything important. So, I suggest that you use the first four digits or the last four digits.

Who cares?

You’ll never forget it. Because the card carries its own pin for you. Just don’t tell anyone and it’ll be fine. And, if someone guess, so what?

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