Re: Too dangerous for children?
While I agree with most of the statements about avoiding joint techniques, I have to clarify that it's not because the children lack control. I've been teaching children for more than 10 years, and find that they lack a sense of what injuries may occur without control, until I tell them, because they have too little life experience to anticipate what may cause injury, and which of those injuries may be more serious than others. I still avoid joint techniques, because I am unclear on the effects that they may have on growing bones.
But as far as control goes, if you teach children control and expect control from your children, you will get it.