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<p>Well, one difference is that if a fraternity is banned, there are other fraternities to join. </p>
<p>If someone wants to be in a marching band, there are no other options if you ban the marching band. </p>
<p>However, the central point is to recognize that fraternities are at best social clubs; other activities on campus are more about perfecting a skill. In the case of the marching band, the pursuit of excellence in music is certainly more aligned with the mission statement of a university. While fraternities claim that they foster leadership, I think this is highly debatable.</p>