As someone who owns a few drones, I'm quite afraid of them. The racing ones are much more dangerous, but the pilots also tend to be much more responsible. The rotors can definitely cut flesh, which is why everyone has the "disarm" switch (which completely kills rotor power instantly) in the most easily accessible place on their controller. These, I'm not worried about, because every person I've seen flying one has always done it far away from people, and very very carefully.

The automatic drones are the ones I'm afraid of most, due to the posts I've seen on groups I'm a member of. They take no skill to fly, so people fly them without understanding. I've seen people disable the sensors and flying them a few centimeters from people's faces, where a slight gust of wind will mean permanent disfigurement. I've seen people fly them close to trees, next to wires over people, and a thousand other dangerous situations.

Whenever I see that a law forbids me from flying and taking photos, I initially curse the lawmakers and then realize that the same law protects me from the thousands of irresponsible drone owners, and I feel a bit better.