lamont:really this isn't a red flag, its just a yellow one. if you actually do get a fill of 100% and tox at 30 feet and die, then i would suggest switching dive shops...
yeah sure. I'd switch shops and send a QA letter to PADI and NAUI.
I agree with your statements. But if you give a PADI or NAUI card, the diver needs to have run through ALL the performance requirements of that agency at one point. If you can just mix and match, then there is no point having an agency. I worked at an LDS where they gave the NAUI C-card on top of the PADI, but they actually made them do everything for NAUI as well. The price for the course was the same.
I agree with the benefits of whatever agency mentioned here, and that you should be able to be flexible. But one should be careful.
It could have been the Professional Association of Yo Yo Divers certification in some remote vacation location and then the student gets a PADI or NAUI cert. The standards are strict, because there is always stuff that gets fudged out in the "field". If you are too relaxed about it, even more will get fudged. Agencies need to look after this and this is understandable.
Whether this increasing c-card fetish is really helping the sport is another discussion.