Yeah, so let's use it as a training exercise, since we know it is undetectable by dogs & airport security devices. I assume then, that standard operating procedure is to investigate, by hand, every item in a piece of luggage so that something like a 5 oz chocolate bar can't be permitted to pass. Sure, that's the ticket.
What would put the icing on the cake for this story would be if the passengers luggage they slipped it into was an actual suspected terrorist they are monitoring.
"It's a set up" cries the shackled terrorist
"sure" says the judge. "50 years"