Jim - I think it is great that they do it. But I don't think it is their responsibility. Two different things. the person is a customer, using the water they provide. For us, the water bill will usually jump significantly 2-5 different months a year. Is it the district's responsibility to notify us each of those months?
It's one thing if a district employee sees a leak running down the road (similar to what you mentioned of an employee seeing an oil leak), and notifying the customer. But seasonally, our water usage will climb, a lot in some cases. A jump in usage is not always a problem, and I don't want big brother always spying on me.
Geez, I guess I should sign off of LS again