A
diplomatic bag is, by law, any old item that is identified as such and capable of holding stuff, be it a bag, box, satchel or the crusty sock from under the diplomat's bed. The idea behind the concept is as simple as it is prone for misuse: Anything and everything inside a diplomatic bag is untouchable by law enforcement. Basically, we're talking diplomatic immunity for inanimate objects.
And while most countries use their bags for boring stuff like classified files, some countries have noticed their potential and gotten creative. You can basically commit any crime you want, as long as said crime can be crammed inside a container designated as a diplomatic bag.
Well, in 1984 Nigeria took issue with a former minister of theirs,
Umaro Dikko, who had moved to England. Dikko was a bit of a troublemaker, speaking out against the current government and criticizing them at every turn. Not being content with pissing off just one country, he was also in the habit of lashing out at Israel.
So, Nigeria and Israel decided to
team up to bring Dikko back to Nigeria and shut him up.
Operation "Let's kidnap the shit out of this guy" was a great success, with Dikko yanked off the streets of London, drugged and taken to the airport by the joint Nigerian-Israeli squad. But how to get him in the plane?
Ha, easy! They would place Dikko in a wooden crate, tag it as a diplomatic bag and haul him off to Nigeria. No one can do anything even if the guy wakes up and starts banging the lid, because diplomagic. Mission accomplished!
Only someone had forgotten to fill out the proper paperwork for diplomatic baggage. So when Dikko did come to and the crate started moving around, the officials decided to take a peek.
Customs got Dikko out, and the kidnappers were arrested for almost managing to pull off a Batman villain scheme.