Disorder, or Discipline?

I came across this NY Times article titled "About that mean streak of yours: psychiatry can only do so much". It talked about how illnesses termed as "personality disorders" were increasingly being used to cover behavior that really should simply be classified as "he's just not a nice person".

We don't see that so much here in Hong Kong, but what we do have here (and I daresay that the US has too) is an increase in diagnoses of the so-called "Attention Deficit Disorder". Not being a psychiatrist, I hesitate to make a judgment on whether these are truly disorders or not. However, I do often wonder how many of these could be cured with just simply firm parental discipline rather than through medication.