This can be made on topic if I simply add....
Keeping your doors locked will prevent people from just walking in and your having to determine if they are a burglar and deciding if you need to draw down on them.
I lock my vehicle and home at all times. Even in my garage the car is locked.
Why? In case I leave the garage door open over night or it opens on its own.... nobody will be getting in my car so easily.
I remember back inthe day.....
Nobody locked their homes and the car keys were..... in the ignition! In my town people did not steal from each other. Times have changed and people took advantage of this community trust.
You have a choice.... leave your home or car door unlocked and take one of two risks.
One.... The thief sees is is locked and moves on to another car.
Two.... The thief breaks a window and get your car anyway.
There are more criminals that work on opportunity than pure desire to enter the home or car by force.