I wonder if it's different now that Butler has had much more high level success, but during my year at Indiana, there were a lot of legitimate IU/Butler or PU/Butler fans.
They existed in totally different realms, so it wasn't an issue. There were 100% IU fans in my dorm...who also owned and wore Butler gear. Butler played Detroit that year in a MidCon tourney game, and it was a hell of a good time. That was post Mike Miller buzzer beater, and in 2001 they won a 7-10 game before getting smacked by Zona, so they were a "threat" yet. I wonder if there is less of that now that they've had more major success