I guess I’m going to get into a fight here.
To start with I think the big huge FAA lettering followed by the much smaller lettering completing the sentencing appears to be a little bit buffy. ;-). Like trying to look a little too official.
The do not disturb part isn’t a bad idea. But does one really need to advertise that they are licensed? These are just my opinions. I know people will disagree but hopefully not take offense. But my personal style wouldn’t feel the need to brag that I’m licensed. Maybe I’m missing a good reason to put that on your back. But as someone else pointed out, there is no validation that it’s true. It just feels to me like a dose of self importance. Doesn’t make the wearer a bad person. But different things strike different people funny.