Sar linked to the statement in his post. NP _are_ for _everyone_ to enjoy. The NPS needs to weight the activity to the benefit of the many against the very few. If I want to blar 1000 watts of music from a sound system so that I can enjoy the park... they are not going to allow this. But I want to enjoy the park as _I_ want, right?
4 wheel vehicle's are typically only allowed on approved trails in NPs. So they don't cause any damage.
One of the bigger problems with drones in NP is the noise and danger that they create. Imagine 20 people flying drones in a popular viewing spot. These are people who have never flown a drone before. They have not read any directions either. These people can feel free to take as many photos as they want from a hand held camera.
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