In my old farmhouse, all the rooms connect, there are no hallways, so I took the doors off to make it easier to get from one side to the other. I should add I live alone so that’s probably a big factor
As for the entrance doors, no, they are all ALWAYS locked screen AND door. They aren’t unlocked unless you make an appointment with me. Both sides of my family have this weird thing where they just show up at others’ houses and just walk in—no pre-plan, not even a knock when they arrive.