Hi Rach and welcome to the forum.
Unfortunately it's a sad fact but there are arseholes everywhere and those aresoles bring their kids up to act like arseholes and the whole thing goes on and on and on. It's all quite depressing.
I suppose some folk would advocate bigger walls, stronger locks, cameras etc personally I would take down the fences, unlock the gates and perhaps put up a sign asking people not to behave like arseholes. No doubt some arsehole would chop the sign down for firewood but hey...