I've had rifle courses where pretty close to what was going on in the OP was happening, including me. One recent rifle class, I had the far left target and my buddy was next to me on my right. This particular AR shoots brass pretty consistently just behind 3 o'clock. I wasn't doing it on purpose of course, but I would hear him swearing at me during the course of fire.
A couple of the brass left some pretty "good" welts and even burns where the surface skin burned off because the brass sort of landed at the right angle were it got caught right up against the soft part of the sides of his waist/hip area. We laugh about it now. Well, I was kinda laughing when it was happening, but he wasn't laughing. . .
I have my share of brass burns and even scars from them. It happens if you shoot often enough. I usually have a brass net when I shoot, but I've seen some people get all mad and glare at the person who is generating the brass. As long as they aren't doing it on purpose, I can live with it. Yeah, if I'm constantly getting pelted with brass, I would probably take break while the person is shooting or set up some sort of barrier. However, I've seen many get so mad that they pretty much just sit at the bench and glare at the person.
As for the range itself, the rules are the rules. Do I think the rules are too restrictive? Maybe in some regards, but many I understand why they are put in place and it's mainly for goobers who just don't know any better. Then again, it's also for those who think they know it all already and think rules apply to everyone but them when it's usually that same person who is super unsafe. Yeah, I think that some of the ROs can be assholes and rip into people, but I believe most of them do so because they care, not just simply to be an asshole. There are a couple like that though. . . Then again, if you have to see some of the things that happen and most simply because people aren't paying attention or exercising even a minimal level of common sense and know what could happen. Being an RSO at other ranges, I can understand.