So it was being discussed a couple weeks ago, how to handle shulker boxes In The super C. Currently there are protections which prevent placing blocks on the store, but with the arrival of shulker boxes as an item, the question arose on its use in the store? Several ideas were proposed, but we need the input of our wise and benevolent admin. Any other thoughts?

The use of shulker boxes to shoplift more than an inventory of items is strictly forbidden. I'll catch you shoving extra items away... My best suggestion is to place your shulker boxes outside and make multiple trips inside, otherwise it devalues the iron ingot and causes mass inflation in the economy.