I’m not sure there are any unwritten rules. I mean, I’ve spent years documenting my thinking right here, and I have several little acolytes who make a habit of compiling my extemporaneous conversational mutterings like personal scripture… so if I’ve thought it, it’s probably written somewhere.
I have recurring themes, I suppose, if that’s what you mean. Like “protect the property”, “don’t freak the mundanes”, and “we are always on the same team”.
And of course, “do as you’re told”. Which isn’t an unwritten rule, so much as one that should go without saying.