When I was in college, one of my co-workers at my student worker job was a frat rat, and he bragged about exactly the kind of thing Swetnik is describing. They had a girl in a room and guys were lined up outside, taking turns. He was telling us his friends took pictures of him screwing her and giving a big "thumbs up" to the camera, which he thought was really clever. Then he said "I may have to burn the pictures, though. She's trying to claim we raped her but it was her idea, she just got tired after the first five or six guys."
I told him that not only was that NOT cool, if he ever told me about anything like that again, I'd slit his throat and bleed him out. The guy was bigger than me and worked out a lot but he still stayed away from me after that because he figured I meant it... and I probably did because I was a bit stupid and violence-prone at that age. I had an old girlfriend who'd been raped as a kid, and I saw how traumatized she was by it, so I had ZERO tolerance for any mistreatment of girls. My other co-workers also told him he was an asshole, and he was really taken aback by it... he figured we'd all be impressed or something. He ended up quitting pretty soon after that and we were all hoping it was because he got arrested.
I always regret not just punching the bastard in the face, even if I'd have had to do it at work.