I refuse to "voluntarily" give up a seat I have paid for, and am, in fact, occupying, and some

[athena]

84. This thread should answer your question.

There is even a video demonstration in one of the responses.

https://www.democraticunderground.com/10028918567

The example of a person sitting in a restaurant is very different from what happened here. Here, a person paid money in exchange for a promise to be transported from point A to point B by a certain time barring unforeseen and uncontrollable circumstances like hazardous weather conditions. United, in other words, took money from him in return for the promise of service. United's own logistical problems in getting its crew to its destination should not be a legally valid excuse for United to deny the service it promised to provide.

As for what you do with someone who refuses to leave a restaurant or an airplane after having been provided the service they paid for, see the thread I referred to above.

Although you claim that you are not condoning physical violence, you keep asking for alternatives, as if you cannot think of any, and you refuse to accept the alternatives offered. That gets awfully close to attempting to justify physical violence as a way of dealing with someone who is not an immediate physical threat.