No, Taco Bell hasn't been hacked or given up on social media. The fast food chain blacked out its Twitter, Facebook, Instagram, Tumblr and YouTube accounts on Tuesday in an effort to promote the launch of its new mobile ordering and payment app. Tressie Lieberman, senior director of digital marketing and platforms at Taco Bell said, "We wanted to make sure that the message broke through. There are thousands of apps that launch every day. We are a brand of firsts.