[rickroll12]

Could someone explain boxing with dry ice to me? I understand the point is to spoof the weight of an item that you're sending back. I just don't see how this is advantageous. If I initiate a return for a laptop and box an equal weight of dry ice and send that back, how will that help me? Why not just send any random crap item that also weighs the same? I know dry ice sublimates and will eventually all disappear, leaving the box empty, but what is the point of this? Won't they realize they've been duped once they open the box? I've read mothered's blog post about boxing but I still don't quite understand.