I have been informed that saying "with all due respect" does NOT in fact allow me to say whatever I want afterwards to whoever I want. Despite the claims of famed NASCAR legend Ricky Bobby, the phrase "with all due respect" is found nowhere in the Geneva conventions. Also, JAG informs me that the sentence "With all due respect, sergeant, you're retarded" is almost definitely a violation of Article 91 (Insubordinate conduct towards an NCO). Well, that's news to me.
Also, the appropriate greeting of the day to be used when saluting officers is to be "Good morning," "Good afternoon," "Good evening," "Good day," or my unit motto. If said officer is from New England or somewhere, he or she may not appreciate the high level of respect conveyed in the simple greeting "Howdy." Sometimes I forget that the Yankees won the War of Northern Aggression.