Hey guys, I missed a lot of the flaming, which is, I am sure, a good thing. Just pointing out one thing about getting what you pay for, to some extent, as I now feel somewhat responsible for even bringing up PADI. I'm a PADI instructor. I'm also full cave certified and trained through IANTD and NSS-CDS. I would never confuse a 4-dive recreational class with the equivalent of a full cave cert, and I am sure my brother and sister instructors would not either. Thus, let's all try to be fair by understanding the reality of the class.
PADI, as I would assume of other rec agencies, is really clear about explaining to students that at the end of their class, they're trained to dive in as good or better (less challenging) conditions than their training. Students are encouraged to get more training for more challenging circumstances. Most people taking a rec wreck class don't want to pay thousands of dollars for more intensive training, like the cost of that full cave course and the accompanying gear, so they take the rec class, are happy with their taste of the new experience, and don't stupidly exceed the bounds of their training. But if more challenging diving is what they DO want, they are highly encouraged to go get the right training. Make sense?