I find it interesting that you are focussing on mild and controversial diseases such as ADHD and aspergers. Would you say that dieases like depression, bipolar and schizophrenia were also 'fake' diseases? they too are neurological and thus are classified by symptoms, many of which require the diagnosing physician to make subjective judgements. I belive that all human behaviours lie on continuums and it takes a great deal of sensitivity and sensibility to decide where to draw the line between 'normal' and 'diseased' states.

You cannot make comparisons between completely different forms of diseases such as "diabetes" (a polygenetic and environmental disease); "Hepatitis" or "SARS" (both pathogens) and "ADHD" a behavioural dysfunction. MAy I just say that diabetes is also named by its symptoms and only now are the exact molecular mechinisms coming fully into light. Given the sheer lack of solid scientific understanding about the brain, it is not surprising that we have not discovered the physioligical underpinnings.

In any case, a diagnoses have many consequences, both positive and negative. 'Treatments', or at very least 'coping strategies', may help the sufferer to better handle day-to-day life. If we are to see all of these programs as a violation of rights, then we must resign to have paranoid schizophrenics wandering the streets, as it would be consedered "wrong" to hospitalise them. I am not trying to make parallels between ADHD and schizophrenics, but where on the continuum do you draw the line?

Should badly behaved childen be given labels? maybe not. but it is preposterous to assume that they have the right to defy parents and teachers. There is a very careful line to be trodden between love and discipline, and the two are by no means mutually exclusive. Only discipline that is administered with an obvious underlying motivation of love will be effective.

one last comment- about genetics...
the majority of behavioral traits are polygenetic, that is they are not simple inherited mutations like those that cause cystic fibrosis and the like. All of these genetic predispositions are greatly modiefied by environment and thus, in many cases should be all but ignored. An example- if a person happens to have a pattern of behavioural genes that make him suseptible to excessive anger- he should still try to find ways to minimise this anger, just as someone with a less "angry genome" who finds themselves prone to anger due to the way they were raised.