Locally created noise abatement procedures are fine when they simply
identify noise sensitive areas and ask pilots to avoid them. They can be
dangerous when they tell pilots where to fly in a way that appears
mandatory.

Not if everyone is following them, which is the whole point.


Having "everyone" is following local noise abatement procedures does not
make them safe.

The system is broken because a perfectly reasonable procedure is not
"official"

It's not always a perfectly reasonable procedure. Sometimes it's
downright dangerous.

Jose
--
Get high on gasoline: fly an airplane.
for Email, make the obvious change in the address.