It's worse than this.

There seems to be a poorly-thought-out class assignment going on right now that has students mapping things on the UC Berkeley campus.  The problem is, it's already been mapped;  students are just adding duplicates everywhere on top of what's already there and making other low-quality edits.

I haven't been able to get a response from any of the students, but from the changeset comments I'm guessing the class is https://classes.berkeley.edu/content/2022-fall-geog-80-001-lec-001