College questions asking about siblings' schools

[Anonymous]

Why does Northwestern's questions section ask about siblings in college and which colleges? This has zero to do with financial aid. We are full pay. Is there a benefit or detriment to identifying the siblings' private colleges, which are less selective than Northwestern? The name of the colleges isn't a mandatory response, but I would like to know what the purpose of this information is before my kid discloses it.

Any AOs here? What context does this provide?

[Anonymous]

https://www.dcurbanmom.com/jforum/posts/list/1164743.page