Yes - your "rank" changes as you make more posts. You can look at some of the other people (tetxt above their avatar).
You have no avatar - but you stated you were previously in the military. I made that change to your profile.
Law Enforcement personal here have little badges above their avatar. Donating members have a blue dash with text indicating that they donated to the website. Everyone else has black texas symbols - you get more of them as you post more.
However, you have the grenades due to being a veteran.