parking dick head..

Several years back I worked in a Workshop that shut its doors at 12 noon Saturday, there was a pub next door. So once the doors were shut people would park their cars across the driveway so I couldn't drive out, it was a major through road.
I fixed that going inside bringing out a trolley jack and jacked the rear up and maneuvered the car to double park it beside the car further back. It happened many times so when I became aware of someone parking across the driveway I would move them even when I didn't need to go out yet.
A couple of times there were 2 cars doubled parked waiting upon their owners to show up.
I was never spoken too but after a couple of months most cars tended to leave the driveway access clear, there was a sign on the door of the Workshop saying 24hr access required.