I found myself in a similar situation -- that is alcohol, allowing myself to be alone with a man and there you go. In your friend's case, I would say this:
1. If you have noticed that her drinking is a problem, then others probabaly have too. It will ruin any case she has against these guys. And worse, it will be on record that she has a drinking problem. this will ruin her credibility in situations going forward. To punish these two guys, she needs to ask herself, is it really worth it?
2. She should look at this as a wake up call. She needs to control her drinking and also to take note of that point when a guy you conisdered a friend has jumped the track. In this case, it sounds as if she had drunk normal alcohol, not any of these potent chemicals. Or, is there something else we should know.
I can remember a few moments in college, whew, scary. Once I had gone to a party in the men's dorm and decided visit a guy I was friendly with. He had a buddy there and I stayed to partake of his libations. There was a moment when I could see that they were both looking at me and suddenly I felt as if I were in a Bugs Bunny cartoon like a pig on a roast......I knew it was time to leave. I would really like to see women take more responsibility for their behavior and to learn to be more perceptive when dealing with others.....that includes men.
3. She should also know that in a date rape case the campus will square off and some of the women, for whatever reason, will not be supportive of her as much as some of the men. Does she really want that kind of agro and to have her name attached to a date rape trial.
4. she should learn that there is a lot strength in just simply moving on. In excising these men from her life. IF their names come up, she can say that yes, they're bit aggressivve and not very trustworthy without having her name attached to drinking too much herself.
5. In short, she should heal on her own. Go to counseling if she needs it but a very public trial in which she's going to have endure character assination, is it really worth it?