If the only thing I told my kids about sex was to use protection, would you think I was a good parent? If I had never said more about drugs other than "don't," would that have been OK? Then why is it alright that the only thing I told my kids about social media is "be careful?"
Investigations into online inappropriate physician conduct will be up to the state boards. Online behavior from physicians and any other licensed health care professional should mimic their professional life offline. It's imperative that professional ethics is maintained online and offline.