Duff Watson complained on Twitter when his children were refused priority boarding. Southwest Airlines then removed him and his family from the flight until he deleted the tweet.
After Watson boarded the plane, his name was announced over the tannoy and he was told to "exit the flight immediately". At the gate, the attendant Watson told him he was a "safety threat" and threatened to call the police unless he deleted his tweet.
Watson posted this to Twitter following the flight.
"I was really upset that Southwest has such rude front-line staff members," Watson said. "I'm not going to fly them again."