Since shooting ranges have NEVER had a way to prevent their customers from intentionally shooting each other, and only semi-effective means of avoiding accidental or negligent shootings of other range users, I conclude that most shooters at gun ranges are for the most part careful, considerate and competent.
Having seen a few accidents waiting to happen at gun ranges, I realize the above generalization is far too generous. But I still think my point is (mostly) valid.
Every couple of years, the Marines manage to blow away one of their own because some meathead mixed up ball ammo and Simunitions or blanks, and the unit leadership has no SOP that would catch such a mistake.
Note, this seems to happen only in units that operate by “Big Boy Rules”.