I expect people to be intelligent enough to know when to use it.
I would never do that If I would see that a person is slotted RTO that has no RTO tag.
Also called Situational Awareness, anyone? No? hm.
I have an RTO tag and I wouldn't remember what it means, since it's never been a subject in an RTO course before.
My final comment on the matter is that it's not an abbreviation used in any military signals or brevity manual I've ever seen.
And what does situational awareness have to do with this?