In my experience, it's often up to the people in the neighborhood to decide. One of my neighbors down the street a number of years ago was militant about it. Code Enforcement does not routinely drive our streets looking for violations, but if someone blocked a sidewalk, parked facing the wrong way on the street, etc, Code Enforcement would magically appear to give them a ticket. Pretty sure this neighbor had them on speed dial.
In my experience, it's often up to the people in the neighborhood to decide. One of my neighbors down the street a number of years ago was militant about it. Code Enforcement does not routinely drive our streets looking for violations, but if someone blocked a sidewalk, parked facing the wrong way on the street, etc, Code Enforcement would magically appear to give them a ticket. Pretty sure this neighbor had them on speed dial.
I am sure social networks (the non tech kind) help here. Maybe they both play golf or coach each other's kids.