USA TODAY With May being national barbecue month, international food magazine Chef's Pencil released its best and worst cities to get barbecue, and some people on social media disagreed vehemently with the rankings. The publication, launched by Dutch chef Paul Hegeman in 2009, used data from TripAdvisor for the ratings. "We analyzed TripAdvisor ratings of all BBQ joints in the nation’s top 75 largest cities and ranked the cities based on their average rating," according to the post. Chef's Pencil looked at 2,020 establishments offering barbecue on their menu that had at least five reviews. Despite using data from Tripadvisor, the travel company voiced "concerns" about how the data was presented.