I can't agree with this decision. If I wanted to water my neighbor's lawn, fill their pool, or put out a grass fire with water that I get billed and pay for, I should be able to do that. It is a separate issue that, in this case, the neighbor in question was not paying an outstanding debt to the water company.
Would the sharer have also been fined if his neighbor had come over to his house to get a drink or do their laundry? What if they had gone to the YMCA to shower and the coin-op laundromat? Would they also be liable? At spokesman.com:
A Spirit Lake man has lost a court appeal challenging a city fine he received for connecting his neighbor to his city water service via a hose, after the neighbor had been cut off for non-payment. Michael Freitas charged that the city couldn't constitutionally bar him from making a charitable gift of the water to his neighbor by running a hose across the alley. But the Idaho Court of Appeals, in a unanimous decision, upheld an earlier Kootenai County jury verdict that left Freitas with a $500 fine.