I tend to agree that parents often exacerbate the problem. The parent is the one who brings the rambunctious child to the doctors office saying, "Gee, something is wrong with my 5 year old, he can't sit still and he keeps changing the subject when I try to talk to him, I suspect ADHD" and the doctor, seeing a sale, says "Oh yes, those are the signs of ADHD." Without ever acknowledging the normalcy of a five year old with a short attention span and loads of energy. This is a major fault within the entire psychology field.

I worked in a kindergarten class and I actually saw a child being labeled by the teacher with one of those childhood mental illnesses, and I think this can be caused by the teachers abusing their power too. Some little incidence can be blown out of proportion as abnormal behavior when really, kids barely know what normal is.