I LOVE the mental image of yelling at my kids playing in the sprinklers because they are ruining my zone efficiency. I could be that jerk sometimes. Funniest thing I've seen all day. Well done, sir.
My issue stems from them wanting to stomp in the mud puddles (yards a work in progress). So I guess I'm more concerned about them wasting soil than I am about them wasting water.
And for Modawg2k, I agree, a totally unexpected and honestly awesome bonus feature. I'd hit up Franz with the story and have them add it as a cute marketing anecdote. It really is one of those things you'd never pay for, but totally love having once you do.