Actually, that's a fair point, to ensure something can be done about an otherwise legal car that has actually been abandoned in front of your house.
Some years ago, a dappy (now ex) mate was in a right state about having to see a doctor in a neighbouring town to ensure he was fit to drive. Said town is hard to park in, and he wasn't sure if he'd drive all the way or stop at a station on the way and catch a train. He got back home with absolutely no memory of where he'd left the car (possibly* due to paralytic celebrations after the visit) - not only which road he'd left it, but near which station. I spent hours over several days driving him round likely locations, to no avail.
Some 5 or 6 months later he got a letter from the police as somebody had complained about it parked opposite his driveway, making it hard to access. As, by then, his licence was well and truly revoked I finally got to drive his E320 Cdi.