Tampering with the seal is just one way to do it. When I worked in transportation, we saw an operation that could take trailer doors off a truck, simultaneously

Tampering with the seal is just one way to do it. When I worked in transportation, we saw an operation that could take trailer doors off a truck, simultaneously, with out breaking the seal. And put them back on when they are done. We've also seen people cut holes in the side panels and patch them when they are finished. It's an interesting idea. Maybe it creates a "harder door to kick in" and criminals will target containers with non crypto seals.