well at least the plastic propellers on most of the hobby ones will break before they break skin. They whirr something fierce though and are intimidating buzzing in front of you face. Range is very short and battery life is even shorter so not much of a threat. Guy at the hobby house likes to scare you too hovering it in front of you face. knock his $2k toy down if it bothers you. probably break pretty easily. Guy with the gun likely was charged with firing a gun inappropriately. Someones harassing you with it, it should be well within your right to defend yourself.