No, I'm saying it's like a referee. I was a soccer ref for 6 years, dealt with the psychos. You can't see everything at once, all you can hope for is mature players and do your best. If somebody is going to break the rules and you don't see it, they'll keep doing it and you'll catch them eventually. if it's really bad, you throw them out.
Not really fair to go screaming at them for it. It's an annoying, thankless job.