Marathon Pedophile
A breed of Pedophiles that attempts to argue and normalize pedophilia before eventually molesting you, thus amplifying the guilt you feel towards turning them in.
Person 1: "Yeah, he kept insisting societies outlook on pedophilia is unscientific and based on nonsense. He even tried to say that some girls are "mature" for their age and should decide for themselves".
Person 2: "Sounds like a Marathon Pedophile".
Person 2: "Sounds like a Marathon Pedophile".