...at least it shouldn't be (but Ashcroft is the AG, so what do I know).
Look, there is no law against being a smartass, nor is there a law, rule, directive, alert, suggestion, etc. that states that wearing a pin that might offend the Puritanical, might-makes-right "sensibilities of some former fighter jockey is prima-facie grounds for ejection from a commercial jet airliner.
And Ghod help us all if there ever is such a law, rule, directive, alert, suggestion, etc.