Thank you for posting this. The RO should have intervened. But since he didn't, it would have been perfectly acceptable for you to say something.
I have seen similar things and am myself getting into that precarious age. I'm in my 70s and most of the guys I shoot and hunt with are also. We are all aware of the possibilities of our frailties and we do watch each other and will comment if necessary.
We also use only doublegun shotguns and bolt-action or double rifles. I personally will not hunt with someone using an autoloader.
There does come a time when we all have to pack it in. And hopefully we do it before we cause a tragedy.
If you still think Obama is the best man to run this country, your time already has come!