I've posted this before, but I think it bears repeating...
My sister's boyfriend used to work for a Ford main dealer in the middle of London. One of their favourite jobs was a 'spit service' - that's the one where you turn the engine on to confirm that everything seems to be fine, then raise the bonnet, spit on the engine, close the bonnet and do the paperwork. He and his colleagues were routinely paid for 100+ hours a week, though everyone knew they turned up at 10 and went down the pub early. No-one cared. Everyone was making money. (I should add that this was thirty years ago, that dealership has long since closed down, and I'm sure that sort of thing no longer happens. For sure. Un-hunh.)
Not happened in the 3 main agents I have visited today, but a friends mates cousins sister once told me.