I was going to start this thread myself (after reading the replies in the opposite thread), but you beat me to the punch!
As a professional educator, it's exciting to have the opportunity to experience the underwater world, collect images, video and data, and then bring it all back to the classroom for my students. Naturally, many of them are encouraged and inspired to learn to dive themselves. Therefore, it's usually elating to see young people on the dive boats and in the lakes and quarries, many of them experiencing diving for the first time.
The only pangs of usease I feel are when the very young (pre-teens) are the sole partners to what I take to be one of their parents. It's not that I'm opposed to younsters getting certified. Not at all. I do experience misgivings, however, when I see a parent "groom" their child as a dive partner at a very early age. I know that children can learn to be excellent divers, but my feelings of unease rise from fears about what might happen in an emergency. Certainly, most can handle crises with training. But I have to ask just how capable a 100 pound child is of rescuing their 220 pound father (in gear, no less). In essence, the adult is diving "partnerless".
Now before I get jumped on here, let me explain the real reason for me going out on a tangent like this (probably should be a different thread, I know). I worry most about the psychological implications of dealing with an emergency. Just say the horrible does happen, and the child is unable to save their parent (whether it was because they were physically unable to or not is irrelevant...it could be something totally unrelated to the dive that causes the accident...heart attack or some such). How capable is the child in handling the stresses and psychological damage that would likely result? I can assure you, recovering from this sort of experience is tough, even for an adult. I worry that the extremely young might never recover fully.
Okay, sorry to blather on about what, in truth, is an extremely rare event. In short, I love to see young divers. I wish them all the wonder and enjoyment that a long life of diving might provide.
Godspeed.
Guba (my granddaughter can't say "Grandpa Scuba")