Hi,
I personal do not fear overcrowding of some secluded spot suited for amateur astronomy. If you are close to a city you will meet people going out with their dogs at night time. You probably meet some local hunters or farmers working at night time. Germany has a dense population (smaller than CA but twice the population). Everywhere within ~5 km there is at least a small village. The biggest free areas are some military training grounds. 99% of the people you meet at night you'll meet anyway.
In Germany we have a high sense of data privacy and a more restrictive legislation. This leads to pixelizing private homes in Google street view or preventing private phone number entries in public databases without consent. Think of it before filing private observatories. You have to ask for. There is no general consent because some other source allready filed it.
Btw. using a complete data base is a matter of copyrights even if the data base is public.
Data I like to find in a data base is about weather. E.g. a deep link to weather forecasts.
