We had students whose parents were paying their way, who volunteered to monitor the sign-in/sign-out sheets. They would turn in students who failed to do either, even though many of those students had to work jobs and would forget. They even learned to monitor those students so they would always get caught if they forgot to sign in or sign out.
Over the decades, I have seen different forums post praises of ungodly students, incompetent teachers, and leaders who fell into sin. I have seen posts praising youth workers who helped find girls for Dave Hyles, Vineyard's Gangsters, and students who repudiated God in their later years.
But I have never, anywhere, seen a post praising the students who went around informing on others.