What's a survey course? It turns out that at least another team in the same course had the exact same app idea: https://www.sammybharadwaj.com/huskyswap - even same name. Sounds like this idea was either given by the instructor or the groups cooperated on choosing it.

Hence the idea of swapping must not have been the problem here, otherwise surely the instructor should be more in trouble than OP, and this other website shouldn't still be up.

I remember that class - it was just between recess and lunch!