Both. We generally leave our cans side by side against the fence and that has never been a problem. I’ve never put my cans like that (one in front of the other) in front of the driveway, so I’m not sure what is happening here or how that happened.
This fine also seems to be excessive. My cans are not taking up any sort of excessive space in the alley or blocking anything but my parking pad. It’s wholly possible all the alley infractors were fined, but there is generally much much worse than this.