So I was randomly searching the other day, using the search term "sorority peeing" which seems so obvious. I came upon a crappy photo and a story from the Washington State University student newspaper. Here's the link:
https://www.spokesman.com/blogs/hbo/...ic-pee-charge/
The photo is attached. It's interesting that this photo still has EXIF data attached despite the fact that it's tiny and low-res. It sure would be nice to witness this first hand or find better photo documentation!