In the last few weeks, the NASCAR world, including Kyle Busch, have learned what is and what isn’t acceptable on the track. Kim Burton is happy to hear that Busch was not willing to wreck her son dangerously in order to win at Daytona. The cycle of great NASCAR talent usually goes like this: Impresses and dominates in lower series, gets to Cup Series, annoys Cup drivers with aggressive driving trying to prove themselves, matures into an elder statesman of the sport and talks about racing with respect. For all of the warts and things that Kyle Busch has had in his career, he has come around to …