He plays one on TV. ; )
He claims he is, however, the first day he showed up here on FR, he went way over the top while insisting that no one should take antibiotics for inhalation anthrax until after symptoms appear. He emphasized that it was like any other disease.
He then went into a frenzy of insulting anyone who dared point out the folly of the free medical advice he was peddling.
In other words, he gave people a recipe for death, and then tried to endorse it with the Hey, I'm A Doctor! trip.