Regarding the aspect of this thread pertaining to the (US) constitution
(and you'll have to forgive me because as a Canadian, while I know more
about the US constitution than my own "charter of rights and freedoms" I
don't know it all),

It does seem that the US constitution does not really govern the legal
relationship between US citizens - be they real citizens (ie - human
beings) or corporations. Only between the gov't (perhaps any level of
gov't) and citizens (as well as perhaps between different levels of
gov't).

The concepts that the constitution speaks to are not really ones that
exist between citizens.

For example, an individual or even a corporation can not take away or
impact my right to free speech or my ability to perform free speech. An
employer may fire me for excercising free speech, but they can't
imprison or fine me or take away my property (or life, or liberty, etc).

But with regard to holding me on a plane for 7 hours against my will,
here we have a corporation (a legal person) interfering with my
liberty. Unless this has already been dealt with by the supreme court,
I say that it's high time that it should be.