Seriously though. James Potter was a much better man than Severus Snape. Whereas James bullied Snape while they were kids and then grew out of it, Snape used his position of power at Hogwarts to bully children.
Never, never be afraid to do what`s right, especially if the well-being of a person or animal is at stake. Society`s punishments are small compared to the wounds we inflict on our soul when we look the other way.