It is not that simple though, just because you have a right to does not mean you can abuse that right either, examples including using unreasonable force, being negligent/careless.

But it is quite clear what the CEO thinks regarding this; "no one should ever be mistreated this way", "so this never happens again", and "we can't do that" are some things he has said that suggests what happened, should never happen at all or ever again (regardless of what right they had).

As I said, if this ever goes to Court, I do wish a decision can be made on the lawfulness of the eviction - this would make it black and white in terms of removal of a passenger once on the plane. It lets us passengers know for certain what our rights are once I am seated in my seat, just in case of that 1 in a 1,000,000 situation.

Anyway but I doubt it would end up that way though, this will definitely end up with an out of court settlement with large quantum, no admission of liability/fault on United's part and of course everything will be confidential and we can only speculate.