girlfriday: Check your familiarity at the door

"Familiarity Breeds Contempt."

I've always thought this translated that if you got too comfortable around folk you would come to resent them.

What if it means instead that to treat people in a too-familiar manner is to breed contempt?

You don't have to belong to the Dear Sirs crowd but email leaves us especially vulnerable to the temptation of over familiarity.

I have some whoppers of examples. Do you?