It is purely a lack of work ethics. To Nepalikanchha's question about 'have you not taken your picture at work?', the situation here is different. The doctor is not taking a pic when she is working on something sitting at her table. Think about a judge taping his/her verdict and posting it on youtube. Do you think that is right? Based on your arguement he/she is just sharing a moment at work!!!! How ethical is that???
One has to understand his/her responsibilities and practice those ethically. I have seen people posting their pic taken at work on fb to show their proudness, which is very unethical and shows how irresponsible they are.