Hillarious, poor poor OP.
We had this too with our old night mare neighbours. I was becoming a slave to the brat boys football obsession, not only have to listen to the very loud thud thud thud thud all day and night as he hit his ball agaisnt his wall we had the loud mums " stop it L, stop it" over and over again whilst he carried on, then you would here her say in a fond way " ooh you are cheeky". And let him carry on.
I would get everyone to sit down for dinner in the garden, ages luring DD down, everyone settled then the ball would come over, narrowly miss us, land in a flower bed and if he heard us there a cheeky shout over and over and over again until my DD left HER MEAL to throw it back.
Then the ball ent over my garden to the other garden, they were asking ME to go and ask the other neighbour to get it back.
After months of this, I put my foot down. Any time it went to the other nighbour I said they must ask them to get it back, we must not go un invited into other peopls gardens. That was called trespassing and it was agasint the law.
I would leave the ball for days before throwing it back. They would see my DD and speak to her like a slave to get their ball back.
I just do not parent like my old neighbour. If I had asked my DD to stop playing against the wall and she carried on I would simply take the ball off her. If she kept on harrasing our neighbours and interefing in their lives by several times a day throwing a ball over, I would not let her play in the garden.
I follow through on my threats. The odd ball in the garden , no problem but several times a day is disgusting and I cannot belive anyone would think its ok to do this to a neighbour?
BTW everyone loathed her DC, they were horrid brats, liked her but evryone had to stop inviting her round because the DC were out of control.