Yeah the hell with this problem. People die from the diseases that mosquitoes carry. If your friendly with your building inspector, use that to your advantage. He knows exactly who to talk to for results. Don't waste your time with phone calls. Go to town/city hall and start walking into offices and raising hell. Either clean it up and maintain it, or backfill it.
Does your area have a mosquito control department? In our city they can't treat private pools but they will stop by and have a talk with the owner to tell them how to keep it from becoming a problem to the rest of the neighborhood.
One thing that works is dish soap but you would have to use a lot to get it to cover the surface water and also not get caught putting it in.