I've heard the term as "do not fold, staple or mutilate", though.
Even more amusing were the idiomatics that were sometimes printed on the back of floppy disks indicating what not to do with them. One company - Beagle Brothers - took it to a comical extreme by providing idiomatics that included images indicating you shouldn't run over floppy disks with a forklift, cut them in to eights and eat them like a pizza, feed them to an alligator, etc...