tursiops, I certainly don't plan on the "Don't ask, don't tell" course of action, but if a student came to you with a dive-certified physician's release would you let them participate? Or do you agree with tomfcrist that it just isn't worth it?
If they have the signature, that's enough for me. If they are incredibly obese, sound asmatic, are popping pills, and can't pick anything heavy up and they say they have all No answers then we'll have a discussion before they dive with me. I don't want or need to know their infirmities or ailments, but if they seem suspicious, I want the doctor's release. If they have the release, I won't argue with it....."I'm not that kind of doctor."
However, the case in this thread is just that; the customer was in fact allowed to dive, based on his release. Then something new happened.....DCS and administration of O2. The release is now irrelevant, it served its purpose and he dived. What to do now? Recommend a medical evaluation....on a Philippines out island? Klaus did about all he could do.