Reviewing Google Street View again, it does appear that the S family liked to park at least one car across the street from their house on 32nd Street. Here is the red Audi across the street from their driveway:
In the shot above, the Land Rover is parked alone in the driveway, with the red Audi parked across the street, even while there is available street parking on the S house side of the street.
That feels rude to me, but I'm not attuned to the social politics of Zone 3 permit parking.
To be clear, there is a "No parking anytime" sign on the telephone pole in front of the S house, for the roadway from that pole to the corner. But, this still leaves space for one car just shy of the pole, and another space on the other side of the driveway, both of which are available:
I suppose, however, if they parked in the second space indicated, they would have a harder time backing out of the driveway, due to the parked car creating a blind spot. As for the first space, maybe they considered this a hazard, relatively close to the intersection. So, their solution was to park in front of their neighbor's house. If their neighbors welcomed this, then it's not rude.