A good rule of thumb when developing a comedy series is to examine the number of episodes that feature characters in blackface. If that number is higher than zero, you should immediately halt production and consider leaving the entertainment industry entirely. NBCUniversal just announced that it is pulling four (4) episodes of the hit sitcom 30 Rock from syndication and streaming that featured white characters in “race-changing makeup”, as well as a joke about the racist birther conspiracy directed at President Barack Obama. As reported by The Wrap, the episodes are being removed at the request of co-creators …