Prevent doors from shutting with rubber bands
There are a variety of circumstances when we must ensure that the door does not close on the latch. It may be anything from loading the groceries into the car to moving furniture throughout the house.
Whatever the reason, a rubber band may be enough. Attach it to one doorknob and wrap it around the knob on the other side. It will prevent the latch from sticking out, allowing it to be pushed in without shutting and locking.