They'll be caught if they are checked. To prevent checking (to avoid wasting time), it is necessary to ensure that such an opportunity does not exist.

Some interesting logic here. And how do you make it so that Pandora's boxes cannot be taken from under shifted guards? How do you remove that possibility? Because the temptation is great. What if they don't get caught? How do you remove the ability to use level 4-5 scrolls without building a Mage Guild? Is there a temptation to Town Portal using a scroll? What if they don't get caught? Any player who does something against the rules understands that they are doing it at their own risk, and it doesn't matter if it is a Town Portal from a scroll or Tazar in the Dragon Utopia. There are simply rules that must be followed, that's all. And for people with weak willpower who are prone to small temptations, nothing will stop them from opening the map or the save, which is far more serious.