(In)Secure Flight is a bad idea from conception to implementation.
Free persons should not be subjected to law enforcement dragnets just because free persons decide to exercise the right to travel and go by air. Free persons should not be subjected to authoritarian control orders in the absence of a judicial sentence. However, these two principles are what will be violated by (In)Secure Flight.
The idea of (In)SecureFlight is to assert authoritarian government-like control over persons who are too innocent for the government to convict and sentence in a free and fair trial in court and yet who are presumed guilty by the government in the absence of a free and fair trial in court.