Originally Posted by
Sailvi767
People are often carried on freighters either as part of the charter, employees or jumpseaters. Google FedEx jumpseater tries to crash aircraft.
I am aware of the Fedex case and was expecting someone to bring that up. A door would have done nothing to prevent a determined individual, intent on concealing their intentions such as in that case unless you are going to ban the flight crew from using the toilet, galley and bunks while airborne.