We live in a regular road with Victorian terraced houses on either side. Cars park parallel to the road. One house has a dropped kerb and the garden was concreted over years ago. Newish neighbour used to keep a car SORN there. The concreted bit isn't very big, it's only about 2.5m deep so you can only fit a small car on there parked parallel to the house otherwise it would go on the pavement. Obviously no one parked in front of his house then as he had a car on the 'drive' so no one would have wanted to block him in.
The car is no longer there and the neighbour gets really annoyed now if anyone parks in front of his house in 'his spot'. Leaves notes telling you not to park there or passively aggressively parks his car really close to whoever parks there making it difficult to move your car. He thinks his dropped kerb gives him the automatic right to park his car there and no one else.
YABU - you shouldn't park there as there's a dropped kerb
YANBU - it's a public highway so park away