American Tactical has been using the AT symbol for over eight years, The ATC challenged them but was not as successful as they wished by having them drop the symbol. Here is what they have.
https://scontent-atl3-1.xx.fbcdn.net...ba&oe=5CC02EE0
The ATC challenged them to no avail. (Note: I dropped the discussion from Facebook.)
Just for discussion purposes what is your opinion on this?