Being over zealous can be just as dangerous, some years back I dropped in on a small HGV outfit carrying quarry products, I caught one of the drivers "nipping" up his trucks wheelnuts, with 3/4 drive socket, breaker bar and 6ft of scaffolding tube to jump on! I asked him what his procedure was, it transpired he did this every day to make sure the nuts were tight. I told him to undo one, the stud snapped, they were all stretched and waisted and just waiting for one to snap on the road and they would have gone like a machine gun, and the front wheel with them. New studs all round and a word in the gaffers ear.
A nice lad, and very handy if you wanted anything heavy lifting......
You could probably have used his head as a jacking pad without damaging it, but maybe harm jack!