Concern trolling is a form of Internet trolling in which someone enters a discussion with claims that he or she supports the view of the discussion, but has concerns. In fact, the concern troll is opposed to the view of the discussion, and he or she uses concern trolling to sow doubt and dissent in the community of commenters or posters. Although this practice originated on the Internet, it has since spread to the real world as well, with concern trolls popping up in a variety of places from network television to op-ed columns. Artful concern trolling involves developing a...