Chicago aviation security officers are not supposed to board planes unless

[randome]

10. You could be right.

I would think that "imminent threat" could be expanded to include flying a plane with more passengers than legally allowed, which is the case since, with the addition of the 4 staff members, the plane was overloaded unless 4 passengers were removed.

At least I could see that kind of back-and-forth with a judge and jury.

But this is the only point I've seen so far that COULD be trouble for United. Everything else comes down to Dao purchased a ticket to get from one destination to another, he did not purchase a seat and plane-specific ticket.
[hr][font color="blue"][center]"The whole world is a circus if you know how to look at it."
Tony Randall, 7 Faces of Dr. Lao (1964)[/center][/font][hr]