Here is my point ive recently started to play rust in a new group and they decided to give me the codes for all of the doors, Here is the point they have like a million doors inside their base, normally you would go through every floor to get all codes for all doors. But how about this.
The toolcupboard also has a Codelock if you press the code in you will unlock all doors in its permission area, that means if you wanna give someone all codes of youre base you just bring him to the cupboard. This would be a cool change.
If the Cupboard gets destroyed only building blocked will go away codes wont unlock.