It's no good asking me for advice how to deal with people, I'm spectacularly clumsy at it, but I thought I'd chip in with a couple of stories in the same vein.
I live in a semi with a shared drive, the neighbour and I have garages behind the houses, with parking for one car in front of each drive. His garage is full of junk, but at times he has up to six vehicles: a works van, family saloon, and up to four racing cars in various states of disassembly.
There's one in front of the garage, one in the end of the drive, one on his front garden, one in front of his house, one across the end of the drive, and one in front of my house. He has filled the rest of the drive with barrows, cement mixers, paving slabs etc. I can just about get the wheelie bin past.
A few decades ago, my mother and her sister used to live in a house in the middle of the town centre, and every Tom Dick and Harry in town used to help themselves to their drive as a car park.
One day my mum moved out into a flat of her own, but when the removal men arrived they couldn't get the van in because someone had parked in the drive. We phoned the police, but when they turned up they just shrugged, said it was nothing to do with them, and went away again.
So they parked the van out in the road on the double yellow lines, and brought the town centre to a standstill for a couple of hours on a Saturday morning while they carried everything down the drive past the car. That didn't seem to bother the police either.