I think you are misstating the situation:
1. The IU student section was presented with the names of family members of the Purdue team. That is a known fact. Nobody thinks it had anything about the sister's disability. The disability was already pretty well publicized for valid reasons as a human interest story in the sports press. In other words it was not a "secret".
2. The IU student section, probably on their own, began to make fun of Haas' sister and her disability. This was in very bad taste and shouldn't have happened. It is a bit like the racist comments that same student section made to an Asian player earlier that year. Not cool, but not an organized administration sanctioned effort.
I don't think there was any overt plot to do this. It was just bad judgement on the part of 18-20 year old kids that are passionate about their team. I think the IU administration took action to correct this issue. That is what most Purdue posters think, so please try a little harder to get the facts straight and hold your indignation for the next faux pass.
Listen dumbass, you have a Purdue poster on this very thread stating the IU student section printed out flyers instructing the students to mock Haas sister because of her disability. I already linked a picture that shows no such thing existed.