The door locks at my church are constantly being accidentally locked because the deadlatch button can latch by a simple push. Someone comes up and turns the handle, but inadvertently pushes the button - now it's locked. It can be unlocked from the inside by operating the handle, but requires someone to be inside.
The locks can be more securely locked by pushing the button in and turning it 90 degrees. It requires someone to unturn it 90 degrees.
Is there a way to disable the "push only" locking mechanism?