My point and beef is that the bolded items (the ones I bolded, that is) are arguably pretty relative, evaluated through tests that are to lesser or greater extents somewhat subjective, and could end up making people qualify as having personality disorders simply because of unusual values or circumstances (for instance, I would question the validity of a paranoid personality disorder diagnosis if the test-taker lives in a particularily stressful dog-eats-dog environment). The ridiculously high prevalences (eg: 1 , 2 ) validate me to an extent.
Anyway, I think I'll question someone I get along with from the psych squad on monday, if I catch him on a break. I'm curious about his insight on the matter.
No, if anything, unusual circumstances would DIS-qualify someone from having a personality disorder. See point D: is not part of socio-cultural environment. Certain behavioral patterns are common in certain environments and are an ingrained part thereof, so if someone enters such environment, he will start displaying them too. That, however, does not mean he does have a disorder.
The bolded part in preamble simply states a personality disorder is a disorder of personality, and I cannot see why would that be controversial. For D see above, meanwhile E excludes people exhibiting symptoms due to being on drugs or drunk or having a head trauma, all of which can cause pathological behaviors.
For example, head trauma may, in some cases, lead to Cotard delusion, which is psychotic in nature, yet it does not mean the person was psychotic before (or after the trauma is fixed, if possible). Drugs also covers medications, which are known to produce a variety of possible psychological side-effects.
As for questioning PPD in certain environments: I suspect that it would actually be valid, otherwise you could not diagnose any other case of PPD as valid.
As someone whose behavior is disturbingly close to the line that lets you be diagnosed with it, I suspect it may actually be less of a disease; unlike depression, which involves pathological biochemical changes, PPD seems to be more of a general learned attitude. Pretty much an educated-sounding word for someone rather jaded. Although experiments have been carried with monitoring the disorder in twins, I cannot help but wonder: were they raised separately? If so, there can be a decent claim to genetic risk factors, if not, the claim would be dubious at best.