Well, I was bored yesterday (not sure how I found the time to be bored) and watched a few episodes of Bones on Sky.
Now, I'm not an anthropologist or biologist or chemist, so generally the episodes are entertaining. But the last one was a murder case that was all about someone hand carrying a briefcase in to the US which ultimately had a USB stick in it. It was meant to be mere diamonds and the whole crux of the episode was that information is valuable. They even had someone using steganography (they even said the word).
The problem is, of course, I have some vague idea of information technology.
The whole point of steganography is that you cannot tell the hidden data is there and certainly can't just spot "this image file is way bigger than it should be" and press a few buttons to find some hidden data on the screen.
Of course there were days when information was hand carried in a brief case (though not on a USB stick), mainly by the likes of banks. This was for encryption or security codes before the use of public key encryption. There are also ways that memory cards can be used to covertly get information in/out of a building past security (I saw an impressive memory card inside a pound coin that you would not see on x-ray even, apparently).
But of course, these days, if you wanted to convey some information, you can do so by many means using simple public key encryption and the internet. No way someone would hand carry a USB stuck in a metal brief case handcuffed to your arm.
I suspect if I was an anthropologist or biologist or chemist I would probably cringe at every episode though....