No, people aren't waltzing up to reception areas and maitres d', putting on a threatening face and making as if they have a gun in their pockets. Instead, they apparently suggest that unless the establishment doesn't treat them in an exaggeratedly accommodating way, they'll post a negative review to a site like TripAdvisor. They allegedly demand upgrades in hotels, or free meals in restaurants. Martin Couchman, the deputy chief executive of the British Hospitality Association, told the Telegraph: "People will either attempt to blackmail during the meal, or sometimes, more worryingly, people who have not even been to the restaurant will post a bad review to try to get a free meal, or a free stay in a hotel's case." Get the full story at the Telegraph and CNET