If your goal is to acquire an unreleased video game, they may be a very trustworthy person. But probably not the type of trustworthy you want to manage a store.

The "steal from your employer" angle isn't so great, but "working around the system to accomplish your goals" is an ethos widely lauded here on HN. If the person had placed a pre-order through Amazon and found a way to mark their order as "delivered" when walking out the door with it, I'd have no problem with it.