No Hat, No Salute Areas...suggestion, mandatory, order, convenience? Which is it?
While at Kandahar Airfield (KAF), the base SOP was that if you didn't have stars (or foreign rank insignia equivalent) on your uniform, you were not getting a salute. So it CAN be situationally altered by local commander.
Also, ArmyStudyGuide is not an authoritative source on pretty much anything. According to their board study guide on Army History, they still claim that the Vietnam War is the longest conflict in US History.
If I'm reading this correctly, then yes it is an order.
If the order came from a senior ranking NCO or Officer.
A one way sign is not always a one way sign if the MP instruct you to go the other way.
Even in traffic during construction the one who holds the flag to instruct traffic is like a peace officer. The signs means nothing if they are going to be over ruled by someone of authority.
If a sign says go straight a head, and an NCO such as yourself SSG Burns instruct an E-5 Not to go straight, but to return back. but that E-5 fails and goes straight. BOOM!!!
He gets blown up. Why? because he didn't follow a lawful order, an order that came from you.
So if the Drill SGT out ranked you, he gave you just what he said a lawful order.
The same applies to you with your subordinates. If you tell them something joking around, it can be considered as a lawful order, even though no such regulations exists to back up that order you gave.
My personal thoughts:
SSG Burns, I think you acted accordingly based on the given circumstances at the time. Which is something that is to me admirable. What I can say is that you never got in trouble and I hope that some day soon I get to see your rank go from SSG to SFC. :)