You are right - there are definitely things that can be done (what you are describing used to be done on Xbox games for example). The main thing is making sure

You are right - there are definitely things that can be done (what you are describing used to be done on Xbox games for example). The main thing is making sure that these things are ubiquitous, that there isn’t a workaround and that systems are in place to do the specific checks which are different for each item at every return point. In the example with the Xbox games, not all games had the seal, or the same game SKU might sometimes have the seal and sometimes have a standard case. Then there was the workaround where people could lever the case open at the top and still take the game out. The danger of seals is sometimes they can provide a false sense of security, but they probably do help when implemented well.