1: Follow the 10 commandments (and also the site rules).
2: _____________________________________________________
3: Breaking rule #2 will result in a ban and your posts being deleted.
4: Rule #2 must remain secret.

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Wait...
wut

5: Rule #2 can be changed at any time for any reason without notice.

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5b: and already has been.

Cool! But oh no...rule 2 is hidden!

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About Rule 1:
We all break this rule, but most Christian denominations don't even try to follow the fourth, which explicitly starts with the word "Remember," as if it could be easily forgotten.