Today, Vale Tudo events are still taking place in great numbers around Brazil. However, due to the violent and bloody nature of the sport these underground events sometimes cause controversy in the media. Critics of the sport argue that Vale Tudo shows should all adopt the MMA "Unified" ruleset created in the United States by Athletic Commissions, and used by various other countries such as Canada and England. On the other hand, supporters of Vale Tudo criticize the Unified Rules, pointing out that there is no medical proof that the Unified Rules are safer, no contestant has ever been killed or permanently disabled while fighting under traditional rules, the Unified Rules were created not for safety, but to ban techniques that commissioners saw as "uncivilised" (such as the soccer kick and headbutt), that the Unified Rules set is not used in Japanese, Russian, Singaporean and Thai promotions, and so on. Proponents also counter that the style of mixed martial arts fighting created by the Unified Rules is now so different from traditional Vale Tudo that it should be treated as an entirely different sport, just as kickboxing is considered different from Muay Thai.