Live television can be unpredictable, especially for a long-running comedy show like Saturday Night Live. Over the past 50 years, SNL has faced some outrageous behavior from celebrity hosts who crossed the line. More than a dozen performers and guests have been permanently banned due to their attitude, backstage antics, or on-air stunts that embarrassed the show. Explore the notorious incidents that led to these bans and why some celebrities will never return to the iconic studio.