What if someone felt that the accused's life or career would be destroyed, and didn't want to feel partially responsible for that?
I've never been part of the free sex without attachments crowd. I need some emotional attachment and genuine feelings of interest, before proceeding. Wouldn't there be some psychological issues and feelings to work out, before bringing any kind of accusation into the public? It's not just a Moral decision, as everyone who's involved, will have their life changed, and not necessarily in a good way, from an event.
How's that different than if you report a theft of a hit and run? The accused will also face negative consequences. If I suffer from physical assault inflicted on my by anyone, you can bet your sweet *** that fear of ruining their life will be the last thing on my mind. If someone commits a serious offense, you report them, period. That's especially true when it comes to violent offenses. It's not like the alleged offenses happened in the 1950's and the 1960's when the cops dismissed genuine rape allegations with "boys will be boys" or "she was asking for it". They happened in much more recent time when the scales of injustice swung in the opposite direction.