The neighbors below my pond turned me in to the Natural Resources District, saying that I was "Releasing water onto their farm". The NRD came and looked at it and told me that it was the first time they'd ever seen someone complain about too much water during a drought. The water dribbles into a creek through a 125 yard waterway that's on their property--but only after a rain. Needless to say the NRD was amused and informed me that I could continue to let water go through my spillway during a rain event.
If they were really smart they would build a small dam so they could water their cattle or stock fish. I think it might even increase the value of their property.