You can see vintage footage of Harvey's press conference at this link. Harvey had an instinct for what touched the humanity of voters and he didn't mind being thought a bit ridiculous in pursuit of such an issue.
San Franciscans still continue to push back against encroaching dog feces. On my precinct photographing project I've collected dozens of images of attempts to shame dog owners into dealing with their pet's leavings.
When Harvey was promoting the pooper-scooter law, he was laughed at. But as has happened with gay rights, some aspects of our world have changed for the better. I was touched recently by this anecdote from the Times Well Blog.
Maybe the lesson that we're all better off when curb our dogs is more socially significant for our society's survival than one might at first grasp. Maybe Harvey was on to something.