When an E-4 calls me "hey" or "hey man" knowing that I am an officer, should I bother to correct him?

For me it depends on the environment and what's happening. I work in a lot of TOCs but I still say sir or ma'am. But in the heat of a lot of stuff going on my OIC and I will say hey (last name) to each other because things are moving too fast. But that is the relationship that my OIC and I had. No matter what I always said sir or ma'am until I was told just say my last name when this situation is happening. On that same note if you feel some type of way about it let the SPC and also don't say hey to him/her. I see this a lot where officers and NCOs want to be called by their rank but have no issue say hey you to someone junior to them. Respect goes both ways.

Yes sir

You are ALWAYS an officer, sir. When you are home in bed, out with your family, at work -- wherever. When an enlisted man addresses an officer, there had better be a "Sir" in there somewhere! It is your duty, sir, to educate the specialist.

When you are the new Platoon Sergeant or the Company Commander you set the standard by first impression on or off duty. I always say to myself as a reminder. As a leader, “everything was not given, it was earn”.

In or out of uniform? Out of uniform and it never crosses over in uniform, do nothing. If in uniform correct immediately and find his direct supervisor and have chat.

1. Hay is for horses.
2. E-4s have E-5, 6 and 7s plus LTs and CPT. Give them counseling statement and teach them how to properly train 4-s.

I would like to think that the statement: " you are on duty 24/7" while serving on active duty applies here. Each individual has their own opinion on this matter. I've heard stories where units have been together so long, that some of the members get casual with each other. Still, proper protocol requires you to address an officer as "Sir".

If you were in civilian clothing, are you sure the SPC recognized you? You mentioned you had only come across him a couple of times in a work environment. One way, or the other, the soldier needs to be corrected, but I feel the tone of the correction should be a little different depending on the situation.

Yes Sir is the way I was taught.

Yes, you should correct this E-4, There has to be respect in the ranks. In my day we addressed everyone by their rank, The rank first then the name.