I cant comment on other country's rules but here in the uk we have rules that are specific to drones fitted with cameras.
Are these just for safety or more for protecting privacy?
I think privacy plays a part, or else why would those additional rules only apply to drones with a camera fitted.
Below is an extract from the CAA guidelines.
"When you fly a drone in the UK it is your responsibility to be aware of the rules that are in place to keep everyone safe.
Follow these simple steps to make sure you are flying safely and legally.
Make sure you can see your drone at all times and don't fly higher than 400 feetAlways keep your drone away from aircraft, helicopters, airports and airfieldsUse your common sense and fly safely; you could be prosecuted if you don't.
Drones fitted with cameras must not be flown:
within 50 metres of people, vehicles, buildings or structuresover congested areas or large gatherings such as concerts and sports events"