It seems incredibly irresponsible for a doctor to prescribe things based on an internet conversation without a physical exam. You can't auscultate (listen to with a stethoscope), visually inspect, run labs, do basic imaging, etc. over an anonymous internet forum, which are basic facilities that anybody should expect a doctor in the US to utilize. It is plainly evident, once you become involved in clinical encounters, that you discover things on exam that the patient didn't know about, forgot to tell you, or wouldn't be able to find themselves. These findings are often critical for diagnosis. Telling the patient to take a certain drug without that data is dangerous and irresponsible.
You could certainly offer general "advice", but this will never be a substitute for seeing a doctor. Perhaps interfaces with video and sound are able to up the bandwidth of internet medicine but currently there is still too wide of a gap between that and actually laying hands on the patient.
I was not surprised to find that this is exactly what the linked document of related policies by state medical boards states for New York (http://www.fsmb.org/pdf/InternetPrescribing-law&policylangua...):
Section 80.63 of the controlled substance regulations requires a practitioner to physically examine a patient prior to initially prescribing a controlled substance. Issuing a prescription for a controlled substance solely on the basis of a questionnaire or other medical history submitted to a practitioner over the Internet does not meet the requirement of a physical examination or establish a legitimate practitioner-patient relationship and is not a valid prescription.
I cannot find anything controversial about that. I am all for forums linking doctors to talk to more patients, even for payment, but keep the "MD" out of the name because this is not a true substitute for seeing a doctor.