This is my first message too. Heavy footballs/basketballs often come into my garden . They are usually being thrown at the hoop from a huge trampoline so I have the noise of the trampoline, heavy balls hitting the basket ball stand and then coming into my garden, My neighbour's children have grown up and left home but she now encourage lots of children to use her garden. Mostly teenagers and they come in groups of 3-6 or more. The police have been involved but they say they can do nothing. Can anyone offer any advice?