How about over other people's property without their permission. How about around public roads, keep in mind to penalise people for poor behaviour, you need to go through all the legal gymnastics of defining exactly what is illegal versus the simple expedient of it all is illegal (this up to clarification for manslaughter and homicide should a drone crashing into a vehicle cause the driver to lose control and crash).
Next up public parks. Now consider the sound principle of law for a public recreational spaces, those who have the least impact have the greatest priority. Easy example, take a lake, a popular swimming lake. Now up turns a douche ski boat operator on the once swimming only lake, no law bans his boat screaming around the lake driving all the swimmers from the water and deafening all nearby residents. Ski boat douche expects to clean up renting rides as the only operator on the lake, public park lake, why should the one ski boat operator be denied their chance for profit ahead of say a thousands swimmers, swimming for free. America of course, yeah profit, screw the swimmers and residents. Rest of the world, well, no, those who have the least impact when using the 'SHARED' resource get the priority because others can still readily use it versus the ski boat operator who presence actively denies access to others.
So for drones in public parks, well, there use will interfere with the people's uses of the park. In terms of noise, annoyance and risk of injury. So drone parks, basically use only in parks where it is specifically allowed versus non-drone parks as in all parks where the use of drones have not been specifically allowed and sign posted. Public roads absolutely not. Over other peoples property without their permission, again, logically strictly forbidden. Use over your own property, no problem at all. These are not high altitude devices like planes they are low altitude devices, hence huge restrictions.