Our neighbours' kids play in the cul-de-sac than runs along our side boundary (front and back gardens). No problem with that. Their footballs are constantly coming into our gardens. No problem with that either. I used to just chuck them back. However, as they are getting older, they are now playing with 'proper' footballs - the heavy, leather kind - rather than the light rubber kind. As yet there has been no real damage caused by balls coming over the 8' hedge/fence, but I think that is just luck. In recent weeks, the trellis on the fence has been broken, our hedge is full of football-shaped holes, pots have been knocked over and plants damaged. A few days ago a ball smashed against a big double glazed window in our side porch - it didn't break, but made a terrific noise. Yesterday, a ball missed OH's beloved car by millimetres (we have just sacrificed some of our front lawn to shingle to we can park it as far from the boundary as possible). Now, as soon as I hear the balls bouncing around in the road I am on edge. I don't want to be a grumpy neighbour, but would it be unreasonable to have a word with the parents to explain my feelings and concerns, and ask that they play football elsewhere (they have their own back gardens and there are open fields within 100 metres)?