Being down range when two (2) folks shoot is not in my definition of being too safe!!
They should be banned from the range, dead is dead.
Agreed.
But there is, "can't be too safe," and not safe at all. Shooting while someone is down range is in the second group. And as someone who was a lead RSO on both a public pistol range and for some organized competitions,,,,, I would have banned those shooters permanently as well.
If the persons downrange had gone down when they were not supposed to I would ban them too, and I have. One might be surprised how often someone will walk downrange on a live/hot range to pick up a target or hanger,,,,, I ban them permanently.
That said, "can't be too safe," is still a path to extremes. Such as, the flintlock doesn't fire, so they flint must be adjusted. Is it not reasonable to make sure the pan is empty, maybe (i would) plug the flash hole, and move the flint forward in the jaws or flip it over? Maybe remove it, knap it, and put it back. Then unplug, reprime, aim downrange, and try the shot again?
Or, because "we can't be too safe," should the shooter, use a CO2 discharger every time the flint needs fiddling with until it is right?
I'm certainly not saying you are wrong about the bozos involved in shooting while folks are downrange,,, that phrase ""can't be too safe ," sets off alarm bells with me.