absolutely! my daughter and son-in-law were in a local restaurant
(we treated them,we weren't there) for their anniversary. He was dressed in his army dress uniform and she was all dolled up. A gentleman came over to their table and thanked my son-in-law and told them that their dinner was on him. They had no idea who he was and were just overwhelmed. I guess this is the southern way.
I have never seen anyone up north say "Thank you" to any serviceman and we have been in many airports.
ceegee