If you look very carefully at the Cyber Orange photo you can see the rear seat headrests are folded back as far as they go. So unless you move the front seats 6-8 inches forward (which would be a ridiculously uncomfortable driving position for most of us), then the rear seats cannot fold completely flat.
MAYBE the rear seats can do a flip/fold thing to end up vertical right behind the front seats. But the backrest hinge at the base of the rear seats looks pretty secure to the rear deck to me.
Oh well, time to break out the toolbox and remove the rear seats entirely. Stow them in the garage at home. Make a base for them and use them as Gaming Chairs in front of your PlayStation. Who would want to ride in the back anyway?