GF
Thanks.
We flew at times as civ public aircraft and at times Part 91 and even tried to act 121 occasionally.
But I've often been cleared for low approaches to closed runways here at OKC...the tower would place altitude restrictions on them if there were vehicles or people on the runway along with the big lighted "X"...limited to something in the neighborhood of no lower than 500 feet, possibly in line with the sparsely populated guidance. Not sure.
But I figured if they were happy, I was. Never heard a word about it, but of course, we were them.