The neighbors should set them on fire right after they call the fire department. And the fire department policy should be to use the burning houses as training.
In the little southern town of my youth every so often the volunteer fire department would go over to the black part of town and burn down a vacant house. I assume they had the owner’s permission or maybe the county had taken them for back taxes. Anyway, they’d let it burn for a while. Then knock it down and get it back under control then let it start roaring again. They’d do this until there was nothing left. It was fun to watch.
Actually in Detroit neighbors do burn down a lot of the abandoned houses that become crack houses.