Please bring back our training drugs?

The news today here in Japan is sort of amusing. As I understand it, there's a group charged with checking that the dogs that sniff out drugs in luggage coming off the planes are doing their job. Now, think about it. How do you check that the dogs sniff out drugs? Well, the obvious thing is to plant some drugs and see if they find them, right? Now what could go wrong with a plan like that, eh?
( Chortle, chortle, chortle . . . where's Murphy? )

Yeah, you can laugh if you want to. I think it's funny.