Strange. But in reality not necessarily dangerous to anyone on the ground, and maybe not dangerous to the pilot assuming the site was recon-ed in advance (ie no wires or other surprises). For pilots of her era, this kind of thing was not unheard of, and I've even done similar myself in the 70's (as a non-pilot pax child, with my uncle flying). The cool uncle of course.
Hopefully she gets here tickets back, but I imagine the hassle and expense will probably discourage any more stunts.
Be interesting to see what she has to say in her Flying mag column...