As is the case with each polarizing sports figure, their success has its drawbacks. For example, Lebron and the Heat winning the NBA championship would be terrible for basketball because it would set the standard for free agency to become a calculated plan to form super teams. Also, as it has been said numerous times, every year the Yankees don't win the World Series is a good year for baseball.
The prospect of Danica Patrick winning the Indianapolis 500 does have its good points. However, they are outweighed by the negative effects it will have on motor sports and perhaps most importantly, the sport of open wheel racing in America.