The problem with both of these points is the same:
> Most date rape or college campus rapes involve alcohol. But ... People act like advocating sobriety is some sort of evil impingement on a college girl's right to have fun.
If your college's social life is based heavily around alcohol, then yes, this drastically impacts your life. You are asking people (let's be clear: women) to self-ostracise if they want to be safe. (Is this a healthy culture? No. You should be able to socialise without drinking. But if you come from a healthier culture, it's easy to miss how much you're asking. "Just say sober" might be low-cost advice for you; not so much for the typical college kid who wants to fit in.)
> Regardless of your gender, if you want to keep it clear that this is a business relationship, drinks alone in a private setting with a member of the opposite sex is a bad policy.
Again, you're asking someone to voluntarily abandon a form of networking, in an industry that is critically dependent on networks.
(Is this a healthy culture? Ehh...maybe? I'd be very sad if you told me I couldn't have a drink with my workmates/friends-from-work - but that's part of how we build our networks.)
And all of this ignores that this victim didn't even do the things you're advising against! This incident happened after a party where several others were present. The "private setting" happened to her.