As DH and I are split down the middle on this one.
We live in a small terraced cottage in a small village. Each cottage has space on the road outside for one car, and the unspoken (and uniquely British!) rule is we do not park outside each other's cottages. Occasionally there will be a funeral or something and an outsider will park there but all in all the agreement works well.
On Saturday night DH and I went out for a few drinks in town and left the car there. The following morning there was a car in "our" space- fair enough, we don't own the road.
DH is incensed because this is a neighbour from over the road who uses her car very infrequently. I have maintained that she's bound to move it again once there's a space on her road- she has not 
DH is now convinced that the car will remain there for all eternity and the neighbour is displaying CFery of the highest order. I think she's just a bit clueless about "how things are done". Though I'm mystified that she hasn't moved it I struggle to lose any sleep over it.
So who is right obviously not the neighbour ?