Earlier quoted context omitted.
Yeah, it seems unkind. What is the purpose here? To teach about art, using art that maybe was someone's learning attempt seems like a huge mistake (and is likely to scare away students). If you aren't teaching, why talk about bad art at all?
Here's a delightful and illuminating 6 minute video which explains some of the purpose. https://www.youtube.com/watch?v=HB6UhGbyXfE Punchline at the end: "We don't say negative things about the art or the artist. Our stated goal is to collect, exhibit, and celebrate this art that would be appreciated nowhere else."
Perhaps this is a 'whoosh' moment for me, but it seems that by simply housing the art in the Museum of /Bad/ Art, you are certainly saying something quite negative about the art and the artist.