Gosh, I wish I had seen this thread while it was current! I have read it all with interest and want to make a few points to try and maintain a balance here!! Maybe my comments will resurrect the discussion!
I am talking from a point of some experience as my daughter is starting a full time dance school in September. She has wanted this for many years and was lucky enough to be acceptedWho knows where we will go from here but we are giving it a go.
Ballet is good for everyone and anyone that wants to do it but this does not mean that everyone has to do it. It is a great way to exercise, encourages discipline and YES, you can spot a child that dances in a crowd of those that don't, but only once they have started to train seriously.
Yes, it is cruel to send a child to ballet against his or her will, just as it is cruel to send a child to swimming lessons, football coaching or any other non-compulsory activity against their will. To allow a child to participate in any activity that they want to do is being supportive.
There are good dance schools and bad dance schools, just as there are good and bad maths teachers/football coaches etc etc. Some do lots of expensive shows and festivals, some do not.
In a good dance school, there should be a good balance between fun and strictness until a certain level, then there needs to be more discipline. Ballet is hard and even dangerous if not done correctly.
No child should start serious ballet training before about age 8. Before then it is all about getting used to movement and doing a few basic steps.
It is not all pink.
Anyone can dance recreationally, regardless of body shape/size. It is true that only those with a certain physique will get a career out of classical ballet. However, this is not as rigid as many people believe and my dd is not an anorexic looking beanpole. There is much more variation in shape and size of professional contemporary or musical theatre dancers.