Just wondering if these devices are only issued to people who had houses in that area before the airport was built. IMO if you knowingly purchase a residence under a flight path, you lose any privilege of complaining about the noise. Modern aviation is already far quieter, and there are plenty of regulations in place to minimise the noise footprint (e.g. modern fanjet engines are far quieter than the older turbojets,…
If we lived by that logic, places would steadily become worse since complaints would only be valid if you lived there before a change took place.
Edit: removed my analogy because that's not really the point of my comment.
Edit: would sure like to hear from others about why they disagree and why they are down-voting this.