You can tell the people in here thinking it's ok to retaliate like that are people that live alone with cats or in their parents basement with cats. I have cats and children. Y'all this isn't the way to go about this.
At 10 they should know better. Now, I don't know the dynamic of this "neighborship", and pettiness is not the way to go about anything. At the same time though, it's only water.