you are totally missing the point and doing it deliberately.
Items in shop are still in the shop they are not "leased" to a customer and not collected when the lease ends. VM and its predecessors know that these boxes they leave uncollected can be modified and used for illicit purposes. I actually owned a chipped analogue box so its not something new. VM and to an extend their staff are responsable for leaving these boxes in circulation
I will give you an example. I had V+ and a V box I called and said I no longer wanted V+ just leave the v box on my account. That was fine but they never picked up the V+ box. A few months later I called and asked then to switch the V+ box back on . I was told there was no record of this box ever being here. Now I could have simply got it modded if I wanted and VM wouldnt have a clue. It would have been there fault for leaving the box here which has a value even if its just stripped for the hard disk
I make no concession for stupidity If I wave my wallet around in a pub then leave it unattended on my table I accept its my fault for leaving it there if it goes missing( which is a damn site better analogy than yours in relation to the topic
)