Doors, locks, and credit cards
It's always been my understanding that when installing a key-lock door knob for exterior doors, you install it with the flat part of the latch facing the exterior so that you can't slide a credit card in and pop the latch.
I now have an elderly locksmith in the house insisting that this is the OPPOSITE of the correct way to install such locks, that the slanted side is supposed to face out, and that it is fine that someone with zero lock-picking skills can pop any such lock with a credit card.
This would be the locksmith hired by the shady land lady who insisted to my son that the landlord is not responsible for providing working locks (both the front door and the garage door locks will not work with a key, they jam and cannot be opened from the outside). Her solution up to now has been to tell tenants not to lock the side door into the garage and go in and out that way, and to use a credit card on that door should one "forget" and lock the door.
Am I remembering incorrectly? I know it is true that a PROPERLY INSTALLED deadbolt is the far safer lock option (though most aren't properly installed, just locking into the decorative moudling around the door and you can kick the door open). But in order to maximize the utility of the doorknob type locks, shouldn't the flat part of the latch face the exterior, so you can't just slide a credit card in there and pop the latch?