I can see how this works, they are able to sniff them out since most films that are bootlegged are dogs!

ARG! POOCHES PICK UP SCENT OF DVD PIRATES
Two black Labradors in Britain have been trained as the world’s first dogs to sniff out counterfeit DVDs, according to reports.
The dogs, Lucky and Flo, are being used by FedEx and British Customs to crack down on DVD piracy.
A spokesman said the dogs had been taught to identify DVDs located in boxes, envelopes or other packaging which would then be sold illegally in the U.K.