Since the constitution was adopted. It can be found right next to the right to deny service to any airline passenger for any reason the owners of the airline decide.
WOnder what the story would be if the JetBlue folks had said "Please turn your shirt in-side out"
Jerk replies - "No, it is my right to wear this!"
JetBlue - "Fine sir, here is your refund. And we have entered your name on our database, you are no longer welcome to fly with us. Have a nice day."
Jerk "But, but, but"
Security guy "Move along there fella, you got no business here"