As a pilot of both full-sized aircraft and quadcopters, I think I can explain how 100 feet could potentially be a danger. Directly underneath the approach path

As a pilot of both full-sized aircraft and quadcopters, I think I can explain how 100 feet could potentially be a danger. Directly underneath the approach path of a runway that is less than a few hundred feet away might be bad. Otherwise, there isn't a material impact. Noone should be flying their airplane within 100 feet of his house (by regulation). I don't mean to call you out specifically, but this is really the problem with our regulatory environment. Lots of people involved with regulation actually have remarkably little understanding of the cost and benefits associated with the regulations that they advocate. I wish that I could go into more detail, but I've seen some truly crazy things being decided by people who literally had no idea of the consequences of their actions or how people in their field actually behaved.