Actually there are buildings (and roads and cars on them) in one or more photos. The others are cropped so tightly it hardly proves what's around the field.

And do an energy calculation on your 6.5 pound model impacting at 50 MPH. Works out to 735 joules, and it more than equivalent to what the construction industry considers a FATAL blow (i.e. from a dropped tool), and their calculations assume a construction grade hard hat. Which is PPE that anyone on the receiving end of your toy will not be wearing. The reason FARs say no overflight of non-participants. Keep in mind, all it takes is one disgruntled neighboring property owner...

And I couldn't help but notice you posted photo of slope soaring. How ironic that you imply these can't hurt anyone where in fact someone was just KILLED recently.