I agree with you all that it is impossible to know what is going on without being in the situation. I guess what it boils down to is that I have information that I think It is important to share with them. I just hope it is received okay.
Thanks again for all the input, and I am going to try to be as objective as possible when I speak to them. At the end of the day, I am speaking out of concern and love, and I certainly don't want to be judgemental! I am sure parents have looked at me in public with DS and made all sorts of judgments. Challenging kids are something you can't not understand if you have never had one! And even when you have, you can only really understand your own.