Unfortunately, (and I absolutely hate this) but social rules and norms these days are dictated by the "lowest common denominator" and sadly there are a good few nuffies out there who are deadset clueless.. Take away some of the morons you see who are allowed to walk in off the street and hire a rifle and you would prolly eliminate a good many of the potential problems...
Still, when people can't even follow a rule like stand behind the yellow line,you begin to understand their predicament...
Not saying I agree with the single load rule at all, but it's a busy range, in the middle of a major city, so you're gonna increase your chances of muppets and needing to cater for "the lowest common denominator"...
Again, don't agree with it, but I cop it cos that ranges advantages outweigh the negatives..