Beyond any "off switch", you need permission on every flight for the "on switch". Lockheed doesn't even give US military manuals, and so only Lockheed consultants can maintain/repair the planes.
Beyond that, it is a horrible plane that is horribly expensive. Low flight time. Everyone in the world who approved buying any, is primafacie corrupt traitor, and straight to jail.
Buyers do not get source code either. Israel gets a special version with no US software control.