Apparently in Japan, their Apple Stores just display all their devices without any security tags on them since it’s built within a trust system where an individual is expected to not shoplift (due to shaming culture) as public face and reputation matters to them along with heaps of CCTV and stricter laws. However, try doing the same thing in New York or Seattle and see what happens…
I don’t think Apple wants me putting devices out in their stores, with or without security locks, since none of them would be Apple devices. And there’d be nothing for me to gain from the procedure, so even if I technically could, I would never want to.