Yeah. If you sit in a seat, and a cop tells you you need to get off this plane, your right is to sue everyone involved. Your right is not to disobey the authorities. If you tell the cop, I am not leaving, its going to get physical. Anyone with a brain their head knows this.
Now, all that is not to say that civil disobedience doesn't have a place in an unjust society. And if this was the fight this guy wanted, well, he got it. He got exactly what he bargained for.
I just cannot have sympathy here. It only got physical because he refused to leave after being told he had to leave multiple times. He escalated it, not the airline. What rule do we want? Do we want to live in a world where because someone buys a ticket, the owner is not free to tell them to leave? Where he can hold the owner of the plane hostage, and force them to take him where he wants to go? Nothing else in our society works like that.
A ticket in the US is a revocable license....its not ownership. If you pay me to drive you to the airport, should I not have the right to throw you out of my car? You can sue me to get your money back, and probably even damages if my conduct harmed you in some other way. But should you be able to forcibly resist, and force me to drive you? That is what this guy was doing. That is just not how our legal system is set up, nor should it be.
United are assholes, but they are right.