There was a 5 year old mauled approaching a tied up dog here. They enforce it in my area.
I work, I study, I run a business from home and I make time for my dog. If they can't be bothered walking their dog they shouldn't have one.
It is wrong for them to disregard the law, particularly those designed to keep their dog and all kids safe. Not to mention the number of bait dogs obtained via theft.