I'll judge him how I want. Anyone who says "deflower" is staying the fuck away from me and my children/any young members of my family. I'm not in school, but if I was I'd fully endorse the bullying of any weirdo that said "deflower", while keeping my own good distance from him
Unreported means unreported to police. You can still find out about unreported crimes through other channels, either from victims, perpetrators or witnesses. The state will only prosecute rapists if they are confident they can get a conviction. Further, not all prosecuted rapists end up going to trial.
There are multiple ways to accurately estimate the number of unreported rapists, as are there ways to accurately estimate unreported crimes of any nature As the graph shows, most of those reported as rapists do not face trial, so cannot be proven to be anything. Regardless, those that do face trial are not proven innocent, they simply cannot be confidently proven to be guilty based on the evidence provided. Not all reported rapists face trial