Man neighbors suck sometimes. Opinions?

To the point of this post, they let the pit wander the local neighborhood unattended.
We do have leash laws, but they ignore that completely saying "He's a good dog."

I try to mind my own damn business just as I ask of others, but you see where my dilemma is on the dog being anywhere at any given time around the house and yard, cars and family including two year old twin Grand kids.
Our back yard is fenced, but the front where our cars are is not.
I don't want to report them really, possibly adding to the problems the guy already has, but dammit it's a loose pit for one, on my property at any given time for another, AND there is a law about loose animals.

What would you do?
If I go and try to explain the concerns to him he'll come off with some attitude and excuse why it's fine and I'll end up going to jail for knocking his *** out. (I hear his attitude all the time, and it's definitely a prison attitude) and he is one of those puffy chested ignorant little pricks with Respect tattooed on his neck.
The Dog didn't do anything wrong but just be a normal acting friendly dog.
Calling and reporting it would probably just end up being an everlasting fiasco with the Father and Son both since they both seem to think the same way.

Opinions?

Unfortunately, I have the same problem with multiple neighbors in this compact subdivision we live in. It is like a mental institution for neglected canines.

Never pet the dog or interact with it in any way besides shooing it off your property. It's hard to do and feels mean, but the dog's feelings won't be hurt. In fact, it will probably welcome the structure it is desperately lacking from it's owners.

Get a sonic dog trainer/deterrent. Any time the dog is out of it's yard or barking press the button and shoo it away.

Are they renters or owners?