I think maybe they should randomly include a container load of hungry pit bulls or tigers! That might slow things down a bit.
@BR&P Lol imagine the look on their faces when they open it and see tigers!
Jokes aside, maybe some sort of alarm can be added that goes off whenever a container is broken into? Something extremely loud and annoying.
Maybe something like this but as a speaker not a 240V siren: https://youtu.be/w22w3NbNAqg