Not knowing what was happening in the cabin, the pilot decided to get the unruly passenger off his aircraft for the safety of the remaining passengers and crew. Disobedience to the flight crew's instructions on the ground is major cause for concern and can become deadly in the air. This buffoon deserved what he got. He was lucky to get the remaining fare refunded as there was no rule that mandated a refund if he was removed from the flight due to his ill-considered actions.
He was in the wrong, but they overreacted to the situation............