Background: Facebook is the most popular social networking site (SNS) worldwide. The growing popularity of SNSs brings ‘e-professionalism’ to the forefront.Aims: To assess Facebook use, publicly accessible material and awareness of privacy guidelines and online professionalism by students, foundation year doctors (FYDs) and senior staff grades (SSGs).Methods: It was an ethical risk to access publicly available information online as many users do not appreciate the lack of privacy involved, therefore a cross-sectional survey was undertaken. Participants included 42 students, 20 FYDs and 20 SSGs from the Severn Deanery (UK).Results: All 42 students and 20 FYDs had Facebook compared with 6 (30%) SSGs. Of these, 17 students (41%), 15 FYDs (75%) and 3 SSGs (50%) had public ‘info pages’. 37 students (88%) reported colleagues behaving unprofessionally online with 16 FYDs (80%) but no SSGs. 32 students (76%) felt their professionalism was threatened online, alongside 18 FYDs (90%) and 2 SSGs (33%). Only 11 students (26%), 10 trainees (50%) and no SSGs were aware of guidelines.Conclusions: Professionals lack awareness of their professional vulnerability online. They are not careful in restricting access to their posted information and are not mindful that the principles of professionalism apply to SNSs.