A tortilla chip maker’s decision to pull its extremely spicy product sold as a “One Chip Challenge” from store shelves following the death of a Massachusetts teen has renewed attention on the popularity — and risks — of similar dares marketed by brands and spread widely online. Spicy food challenges have been around for years, from chile pepper eating contests to restaurant walls of fame. But extremely spicy products created and marketed solely for the challenges — and possible internet fame — is a more recent phenomenon, and teens are particularly exposed to them because of social media.