confusion about ranking of 13 sororities

Please help me out here. I'm confused. There are 13 sororities with 100s of girls in them. And a bunch of girls who belong to a sorority are ranking their own sorority high and others low. Now I don't get how the one you belong to can be ranked high if it has other girls like you in it. See, you have to be mean and bigoted if you are calling some girls low tier. That's no different then being nasty about any other group of people. So if your sorority has more than one person like you in it, it has to be rated low, right?. We'd agree a highly rated sorority would be filled with successful, friendly girls involved in interesting things, resourceful and all. We are talking about an Ivy League university right? Not middle school? Anyone in their right mind would give a low rating to a sorority filled with mean nasty girls who denigrate other Cornell girls. So if you are denigrating other sororities and your sisters at Cornell, please tell us which sorority you are in so we can all avoid it. It does not matter how much Philanthropy you do. If you also put down other girls, you are nasty. I for one would like to avoid you and your friends.