I don't buy that hijacking a plane and disappearing it and covering it all up, in the process generating extreme publicity, is anywhere near a practical method

I don't buy that hijacking a plane and disappearing it and covering it all up, in the process generating extreme publicity, is anywhere near a practical method of kidnapping a person or acquiring a "ghost airliner", and it would be an incredibly risky and brazen 'real-world test of the capability'.