Schools are usually unoccupied at 23:00 hours, and during daylight hours, anyone smart enough to qualify to pilot an F-16 could probably recognize a school-even from 7,000 feet.
On the other hand, private dwellings are often occupied all night long. Thus prudent home owners in the area would put their homes on sale , at make an offer prices and move into a motel immediately.
Considering that this firing range has operated since world war 2 with this being the only reportable incidence, I could be persuaded to allow a current home owner to dump their burden on me, if my bid is accepted. Always happy to help out.
Also, 7000 feet is not an altitude you would fire at a ground target from. Time will tell if this was pilot error (oops, arming switch was on and accidentally squeezed off a few shots), or aircraft malfunction (fired without input).
I'm not aware of any auto firing systems for the vulcan on an F-16, but it doesn't mean it doesn't exist. Could have also been some kind of mis-identified target and th computer decided to shoot. (I don't think this was it, just giving a lot of possibilities.)