In the 1970s when I was in Florida College, a college affiliated with the Non-Institutional wing of the churches of Christ, I came across two young men who liked to get revenge. They were both studying to be preachers. One of the young men was in my dorm. He hailed from a small rural town in the Bible belt. He and his girlfriend were temporarily suspended from school for some infraction of the rules. He gleefully told me of the havoc he wreaked on campus, including taking a dump in front of the chapel auditorium doors, to get revenge on the school for suspending him. When I objected to his behavior, he told me his father was a preacher and his father would not object to his behavior.
Another young man, also the son of a preacher, a more accomplished young man, being one of the top elected officials in the student body, told me how he would get revenge on people who refused to dim their lights while driving at night, and what he would do to people who riled him. He loved debates, and we would attend any Church-of-Christ-versus-some-other-religious-group debate that we could find. 20 years later he was embroiled in taking Florida College to task for being soft on the seven twenty-four hour days of creation, because they were tolerating a professor who believed some of the days could have been billions of years long.
What is important about this penchant for revenge is that it is the opposite of the gospel. The good news Jesus came to die for was the good news of forgiveness. Forgiveness is the opposite of revenge. What is important to note is that many in hard line Churches of Christ are running head long in the opposite direction from the good news. It is odd how the songs the churches sing are written by Watts and Wesley, drunk on the forgiveness of God, while the Bible classes and sermons are filled with shame-and-blame and us-against-them.