The page does say it, I'll agree with that. But I think that the classification as of the disorder basically is a method of classifying people who generally have real life experience with life going wrong, they have reason for behavior which doesn't make it a disorder but instead self preservation.
They are classifying the symptom, not the cause. "Treating" it is fixing their environment and not the person. Too bad drugging the individual is the cheapest solution to create compliant individuals who won't take action.