Are they posting as an official voice of the US DOD? Or are the posting with a title in the hope that associating themselves with the military gives them more a

Are they posting as an official voice of the US DOD? Or are the posting with a title in the hope that associating themselves with the military gives them more authority? Are they identifying their rank so other defence people reading the article will understand that a gunnery sergeant might not be appraised of the relevant information?