It seems that airlines (in general) have not been particularly bothered about terminating contracts, using Captain's authority and law enforcement if necessary.
I would suggest that any court will take a very dim view of this behaviour indeed and, if proven to be the case, punitive damages (in the high millions, or hundreds of millions) would actually be appropriate.
This is another good example:
https://www.yahoo.com/news/united-at...170009715.html
I maintain my view that you cannot deplane a paid up passenger who is seated in their seat. If the CoC were changed to make this possible, I think that would be an unfair contractual term which I hope a court would disregard in future cases like this.