By Daniel Kline Yum’s Taco Bell chain can’t be called boring. It endlessly tries to top itself. Taco Bell wants your attention. The Yum Brands (YUM) – Get Yum! Brands, Inc. Report fast-food chain has long been the kid who jumps into the pool and endlessly calls on his or her parents to watch. The only difference is unlike that kid, who’s not really doing anything worth looking up from your phone for, Taco Bell has innovated and then demanded that people watch. Sometimes that’s bold food innovation (Doritos (PEP) – Get PepsiCo, Inc. Report Locos Tacos are an undeniably good idea), while at othe…