That is the correct way but I see so many people skip it cause either a. I need it powered so I can test what's wrong well it's already open and I found the problem. Or b. I didn't know that was a danger. For the example at my last job we created some titanium dust as a byproduct. If you don't know titanium dust when exposed to a oxygen can and will explode. I had a coworker who didn't respect that and acted careless cause it was a Saturday on overtime and he had other plans, good news he was already bald bad news he no longer had any hair on his head. No eyebrows, his beard stubble, his nose hair all gone because it flashed.
I had another coworker who tried to "help" me with an operation. I was working on one side of the machine and he tried to help clean the other side. He exposed oxygen into the piping, the dust flashed while my head was 6 inches away from the machine. I jumped back and minorly hurt my back(nothing serious, just like pain for a day) and could not hear for 3 days.
These were both with same company. Both were recorded and reported. So many people I talked to there didn't even know about the risk of explosion. Yes there was a sign and yes there was a procedure. Most people ignored them till I told these stories and stressed the risk of titanium dust.
It is though. Yes there was a driver, yes they maybe the driver but in a court you have to prove they were the driver. Yeah it might be as easy as "they were in driver seat of the accident scene". But let's say evidence is only they were seen on a traffic camera 15 minute earlier, well they could of swapped seats or they could of been dropped off somewhere. You nor I don't know the answers to these questions and we shouldn't speculate, it should be proven in court.