This story had stuck in my mind, and I just located it among Cooper's Commentaries; the particular post is here, it's on the subject of 'safety' rules that don't make much sense:
"I met our main body yesterday. They all arrived from the aerial port of delivery (APOD) in (of course) Condition Three. The first thing our unit S-4 (a VMI graduate no less) asked me, `Sir, where is the armory? These Marines have loaded weapons, and we need to turn them in before they have a negligent discharge.'
"I looked at him indignantly and replied, `I'm sorry, Major. I've obviously been misinformed. I thought you were a man of honor, integrity, a fearless warrior, ready and eager to defend our country. I see instead that you are pitiable and afraid of our own guns! No. The Marines will keep their weapons in Condition Three.' Not a word was said in reply, but they all slept with their weapons last night, and there were no NDs. Imagine that!
"Anyway, I wish officers who were afraid of Marines carrying loaded weapons would find another line of work, preferably in the UK. I, for one, wear my (Condition One) pistol constantly. After only one day of being screwed with, my Captains all do likewise. We're slowly spreading the sunshine here!"
In case somebody misunderstands, firearms safety is a very important subject, but it's well-covered by the Four Rules; that there are brass hats out there who don't trust their own troops to keep their arms handy in a friggin' combat zone...