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

Outside the military formality, if you met this man outside the work place would you correct him there? Not likely! You may want to think how important it is for him to consistently call you sir as you expect. If he is respectful in all other ways and communications does it matter that he did not use official protocol? The other part to think about, are you doing your part showing that you deserve this respect? Respect is a two sided picture, are you doing your part?

Always, It's OK for the spec to recognize you but should always be according to the standards. In civilian clothes or uniform, you are a soldier 24 hours a day.

Work hours are: 24/7/365

Smoke his tail like a cheap cigar and correct his behavior on the spot. Reminding him all the time that he and you are both soldiers 24/7. Leave it at that and always remember yourself that you are an officer and your requires that respect. In my 27 years serving I had close friends that were officers and they understood my position as a Senior NCO and I respected there position as an officer and even after we retired from service we still hold that same respect for each other's position.

Honestly? It depends... Do you think he has respect for the rank? Do you think he has respect for you? I knew high-ranking officers through church when I was enlisted, as an E-3 (Lance Corporal); I got a ride from a Navy Captain (O-6) and his family every Sunday while I was at my training school in Virginia Beach. So, it depends on the circumstances; he didn't insist that I show proper courtesy, etc., mostly because our church views everyone as equal in the sight of God, etc. If I ever saw him during the week and I was in uniform, I would have saluted, etc., but I never did.

So it really depends on your leadership style. Is it a case of the guy getting too "chummy" with you? Do you see it as an issue? If so, yeah, talk to him. If not, ... that's up to you.

100% It denoites who we are.

He should know better. You need to correct him immediately with his immediate supervisor present.

Simple answer YES.

If you don't you are negligent in your leadership. If you slack on little things you will never have the ability to lead effectively.

I can be tolerant out of uniform in a civilian location, however, on the base or anywhere in uniform, I expect proper courtesy, and would stop and correct a member. All of us need to remember to respect the rank if not the individual.

Out of Respect he needs to be corrected on the spot, I would find out what unit he is in and inform his NCOIC of this soldiers disrespect and disregard for Military Courtesy. If a SNCO was to hear that he wouldn’t be a SPC for long