John,
I usually agree with your posts, and I have given considerable thought to this issue over a long period of time, and I can't agree with you on several points.
1. Having an AOW cert does not certify a diver's ability, only that the diver passed a very easy course (from what a lot of divers have said on this board), and a course that can be completed immediately after OW training. I could get an AOW card without ever doing an ocean dive or leaving my local quarry or lake where a diver does not have to deal with the very different diving environments found in the ocean. I think we both would acknowledge that an AOW card says very little about a diver's actual diving ability or ability to handle situations when the crap hits the fan.
2. I do not have your diving experience, but I have never had a dive op clerk be the one that checks my card, logbook, or paperwork. It has always been the dive instructor that is running the dive that checks the divers' data, and I am pretty sure they can detect the posers without too much difficulty.
3. From discussions I have had with my brother, who is an attorney, I know that if an OW diver dies on an AOW dives, and the family elects to sue, possession of an AOW card is not going to be "case closed". Lawsuits are rarely that simple. An aggressive lawyer is going to question everything about the dive, and we know the dive op saying "Well, he had an AOW card, so we're OK right?" is not going to end the story.
4. I do expect a dive op to exercise good judgment both above and below the water, and that should involve more than just looking at a cert card to decide who they should take on a dive.
1. The AOW card says little about your ability, but it is something the shop can clearly site as some evidence of training? What does a logbook show that could not be created by a pen and a little bit of creative writing?
2. I have had many clerks evaluate my fitness for a dive by looking at my C-card. It does not take any kind of special training to see if the card matches the criteria, and it doesn't even take a lot of common sense. A couple of years ago I showed up for a dive trip at a shop I use frequently, and there was a clerk I didn't know taking the liability forms and money. I handed the liability form to her and told her I didn't owe anything because I had both a dive card and a gas filling card with the shop. She looked in their computer and saw that I was indeed prepaid for both. She saw that I was listed as an instructor. All I needed to do now was produce my certification card and I was good to go. What? Show my card? I didn't bring my card! Well, then, I couldn't dive. But I'm in the system! Sorry--no card, no dive. Fortunately, someone who knew me came in and told her to let me go.
3. If the question is whether or not the diver met the minimum requirements advertised for the dive, then it will be the end of THAT story.