I don't have those certifications but I did work as range master at Sembach AFB many years ago. The safty problem's I ran into there were caused by people that were simply unfamilur with firearms. It got scarey at times. But you are talking about some kind of matches, which suggest's shooters with some knowledge of firearms. It only suggest's it, some may be new, some arrogant.
Even some experienced shooters have problems now and again. The biggest problem is they become to familur with firearms and become careless where they point muzzles and have a tendicity to assume all weapons are MTY, even their own. This does not apply to everyone of course, thankfully not most. Keep in mind, familuarity breeds comtempt.
Another area I had to deal with firearms safty was as a field trial judge in shoot to kill trials. I had a rule of my own that no guns were to be carried in my field with a round in the chamber. I got a lot of grief over it as many people felt they were more than safe with a firearm, grumbling was the order of the day when I judged. But while I was doing those trials, two people got shot, not seriously but shot is shot. Neither were on my field. The point here is that the more experienced shooters sometime's do figure they don't need you to tell them what safe is. When you are the instructor, it's your parade, lead it! Should someone cry about your safty rules, that's THEIR problem, it's YOUR rules.
For the most part I found the vast majority of shooters more than coperative, even if I had them do something they didn't understand. That was easy to deal with. There is a reason for everything I do and if someone ask's I tell them. "Because I said so" or "because those are the rules" is never an answer that's well taken. Eliminate the argument by having a reason for everything you require. Keep in mind that some people have huge egos and you will have to deal with them. When it comes to range safty, don't be an a$$hole but don't bend!
I said, "....for everything you require". That get's back to leading your parade. Requirements are requirements and not open to discussion. Make sure they are fair, reasonable and promote safty. When you walk onto my field, you follow my rules or you leave.
Not sure if this was what your looking for but there it is.
