Neighborhood trouble

Some childish claim is proposed by one of the neighbor around my villa, very trifle and stupid opinion they have, fallen leaves from my garden closes the grooves flowing just in front of entrance, that happens seldom occasionally. The reason why the flowing is blocked by dusts and leaves are illegaly formed net by them, so without unnecessary barriers, all the water flowing are favorable? They insists to cut off our tree, how come?
In addition, they oblige us to cut out our persimmon tree, because it causes allergic reaction by tree caterpillar on the leaves, crazy opinion don't you think?
As for my opinion, you had better move to some artificial space than natural one in the mountain, if you do not like, natural water flowing, leaves nor insects. All the living things have right to live on earth and they are not alway paying best attention to you and the best way to live in peace is to know you are not a master of the world, so change not others but you, yourself!
Before that, you had better cut out your tree branches that are invading and occupying a part of our garden, please?