Restricted?
"A document marked Restricted can be shown to or discussed with one's family"
Er...no. Restricted still means that although it is on fairly free circulation within the Armed Services, you are not allowed to show it to just any member of the public. In fact if you have a laptop with Restriced material on it, it needs to be encrypted.
However I do agree that the defult position is "if in doubt, make it Restricted. In fact make everything Restricted and then you cannot be blaimed for 'declassifying' material".