I am also concerned when people medicalize/diagnose behaviors, like the dumb one I just described, into psychological problems - at least too quickly. Labeling people, in my experience as a social worker (not a psychiatrist/psychologist or nutritionist), too soon or maybe at all, can cement the problem; the person becomes the problem - the illness manifests because someone said it was there.
My area of expertise and research is not eating disorders. The main point of this post, and the point I will reiterate and end with is: being smart about the calories you consume does not include - never includes - not eating. It is easy to reduce a breakfast and or lunch by 50 to 100 calories by changing its ingredients. I do not advocate any of the behaviors associated with this 'drunkorexia.'