Halemano got it right.
Let your kid know about cigarettes from you instead letting of his/her first exposure be from the cool kids at school.
I don't necessarily think these two things follow. I mean, I was told in OW class that it was "open water" and that that meant no overheads. I think the instructor of that class would equate more to "the parent" than to "the cool kids at school."
So what I'm saying is that I was informed of it ahead of time, by the instructor, and so (since I didn't go diving before being certified) I didn't hear it first from "the cool kids." By the time I was diving and saw overheads I already knew they weren't for me as an OW diver - without further training. It was very clear cut in the class.
Maybe some people will still succumb to peer/guide pressure and go into overheads, but you can't totally control people. On the other hand, is that a reason to concede? When I learned to drive, they didn't just assume I would speed and therefore teach me to drive at 100mph. Instead they explained why speeding would be dangerous and that we shouldn't do it.
I
can see where it would be tough if "all" the dive boats and "all" the DM's locally are taking brand new OW divers into overhead environments in your area.
Does every OW diver get to see the opening of a cave/be tempted to go inside? I would bet my left nut thats a yes.
I would say no. At least not every OW diver since I'm one. I think caverns look really interesting, and I love swimming through stuff, but I know that caves aren't something I should be doing as an Open Water diver, as they are not open water. I suppose that makes me sound like a goody two-shoes, but... it was explained that overheads require more training, and why. Good enough for me.
I took a wreck specialty class, and even then, when that was somewhat the point of the class, and we were with an instructor, some of the long swim-throughs made me nervous. I mean, they were fun and really neat, and I wasn't nervous as in physically uncomfortable - from that aspect I enjoyed them.
But I was not confident that we would all be able to handle a problem if one had occurred right smack in the middle of one of them (they were long and narrow). I knew the odds were in our favor that no-one's reg or etc. was going to suddenly malfunction *right then* but mentally I was not at all comfortable with just going on luck like that. I won't be making equivalent moves again without more/better/different training.
Blue Sparkle