I think it comes back to the fact that one solution doesn't fit all airports. Frankfurt, for example, which I know has been spoken of here before, has a period of the night when flights aren't allowed. Zurich has a period when they're not allowed, yet other airports in Germany and Switzerland do have night flights.
It can cause a relocation of services from the airport with the ban to other airports, which is moving noise from one location to another. The airlines, if there is a commercial business there, will find a means to achieve it. There is certainly an economic impact, and I know that the GTAA is looking to do an evaluation of the economics of night flights because we are employed to help formulate some of the traffic scenarios to feed into that study.
You cannot take one action without there being an impact on businesses not directly related to the airport, on employees at the airport and on the wider community.