I told my wife the same thing a few months ago. We were in a parking lot, an old pick up truck (late 1930's to early '40's era) was parked there with the windows down. She remarked about it possibly getting stolen. I replied that almost no one would know to start it, nor drive it.Blue Flame six, three-on-the-tree, you had to learn the choke and two stabs at the clutch were mandatory.
Nowadays, those would be considered anti-theft devices.