I called her friends, hung out outside of the frat and waited for them to get there, explained the situation, and left once I knew everything was chill. You are correct, perhaps I should have called the cops, but at that age that wasn't really something that seemed plausible, even if it was likely the best option. I guess looking out for someone in a bad situation is only the thing to do if they are your girlfriend? Sounds like a GREAT friend to me!
I sound like a shit friend? You literally just said not to worry about a fucked up friend because "they can do/fuck what/who they want". Sounds like you don't give a shit. And just to clarify, I would have no interest in fucking this chick. I wasn't that attracted to her, but she is an absolute homie that I would certainly want to look out for. In addition, I wasn't that drunk.
I get it from the frats perspective. I used to live in a house with 5 other guys, about as close to a "frat" house as you can get without being a douche about letting people into our parties and having a sole mission of fucking as many girls as possible. I can tell you for a fact that if a guy came to our door at one of our parties and told us he wanted to look for a friend to get her out of there because she was too drunk, I would HELP the kid find his friend and get her out. I wouldn't LET one of my guy friends take advantage of a chick if she is that intoxicated (not that they would anyways, because I don't hang out with complete D-BAGS).
Listen man, at the end of the day, I have seen/heard enough stories from the frats at my school, and others, that I do not have the best perception of them. I have had friends in frats, I have hung out at frats, and I can say that I would be fine with my sister partying in a couple of frats. With that said, there is a culture that I personally don't think is beneficial to young, immature, horny guys that are out on their own for the first time of their life. I think it a lot of times puts guys into a culture that they don't have the "willpower" to handle and they end up doing things that I think they would never do outside of that culture. Can you be a great guy within a frat? Yes. Do I think it really adds much value compared to the negative aspects? No.