Went through security post-customs at ATL yesterday. Let them know I could not raise my left arm. TSO guarding the WTMD looked me directly in the eye and said "Oh ok, No problem" in a rather soothing way that I initially took as sarcastic and condescending. I was sure I was in for it, however, he let me through WTMD with no problem and yelled to the guy behind NoS "He's got a problem with his arm" to let him know why I wasn't going through NoS.
Bags were piling up on the other side as there was a line to enter NoS.