I would never subject a driver to a deliberate inspection it's just like giving them a blank check!
We once had a fleet owner who encouraged us to go in for a voluntary inspection so as to save the cost of getting a DOT inspection at a truck stop. This was before CSA.
The truck failed because the officer found a loose U-bolt "up under there that is hard to see." We were required to get it fixed before our next dispatch. That cost deadhead, down time and the owner paid $800 to have all truck body U-bolts re-tightened. All of them required heat to bust them loose. Don't ask me why the owner had that done. Some things he did made little sense to us.
The Washington state officer was annoyed at being asked to do a voluntary. When he asked me why I wanted it, and I said my fleet owner is trying to save the cost of a DOT, we got what we got.
On the other hand, I know several expediters who go in for voluntary DOT inspections for that very reason and it works well for them.
Still another angle on this is a friend of ours who is well acquainted with the scale cops at a certain scale in his state. When he needs a DOT done, he goes to them and gets the sticker. The truck is in good shape. There is no funny business going on. He just knows they are "good guys" as he says. He does not fear them and takes care of DOT that way.
Now leased to Landstar, and now in the CSA age, I'd be reluctant to go in for a voluntary DOT inspection.
First of all, if you are cited for anything, Landstar requires it to be fixed immediately. And that may not be all that cheap or convenient, depending on where the inspection is done. Second, a violation stays on your CSA score for three years. That's a stiff price to pay for something that might be picked up at a truck stop inspection instead.
Landstar requires DOT truck inspections three times a year. They pay for them if you pass. If a violation is found, you are required to fix it NOW. They don't mess around.
With free inspections provided, and with the requirement to fix it now if something wrong is found, we plan ahead and go to Landstar-approved inspection facilities that are close to Volvo dealers. And we go early in the week so if parts are needed, they can be ordered. We do our best to keep our truck in compliance, but also feel that the fewer interactions we have with scale cops out on the road, the better.