It was a lousy idea and added absolutely no extra measure of safety.
It did however lead to untold cases of people snapping off lug bolts thinking they were loosening the nut.
I bought a chicken coupe find 65 Barracuda from an old school hardcore general motors guy several years ago. 3 of the studs were broken off the rear axle and the tire on that axle was the only one that was flat. Apparently he just didn't get it!
