If you lack out a special cabi area for a vehicle, either you are leaving them to their own devices in that area, or limiting the senses of your own staff you put in to watch them.
Finally, it's just a lot more expensive and cumbersome to have a large piece of machinery like that, and more likely to fail. What happens if the engine fails? Do you need a spare now? Using a blindfold as backup means that a blindfold is sufficient, so just use it and any vehicle now works.
"if you black out a special cab area". :/
Is it just me, or does it feel like the SwiftKey keyboard for android has gotten much worse in its autocorrect in the last couple years?
I did a poor / vague job of describing that the blindfold was used inside buildings too. Folks walked with their hand on the shoulder of a guard in front of them from time to time.
Like new a policy, fine leave the blindfold on longer.
Broken blindfold, just grab another.
But say truck with a broken blackout window ... can't go onsite.
But I guess the boindfolds also had a psychological effect of "we mean business".