That sucks mate.
I have grumpy neighbors myself so I know what it's like.
I ride at the "bull paddocks" which it behind the Dromana industrial estate.
Alot kids ride their bmx's there, so you have to be a little careful, especially after school hours.
Over the years people have cut single track through the bush
and that can be quite fun to ride.
There's also some big bmx jumps.
So if you go down there you'll have some fun, just keep in mind that like so many of the places we all ride at we don't have permission.
I find it best not to park near the houses and also not to ride in the same spot near these houses for too long.
Hope this helps mate.