A lot of the details of that post sound non-consensual, even without the alcohol, such as pinning the girls down. However, ignoring all that... He did it more than once. If any two or three of those girls had shared their stories, they would have spotted the pattern. An average drunk guy will only have one out of every N girls think he raped them. This guy that ratio sounds more like 1:1. We prevent that by getting the victims to come forward more often.