You guys should see the trash sorting at McMurdo station, Antarctica. When I first traveled there in 2009, there were about 20 categories, and dorms had an area just like this one with about 10 of those categories present, each with a page of documentation. If your category wasn't there, you needed to go find that category somewhere else. The categories overlapped and changed from year to year and had names like "paper towels" (compressible non-recyclables that could be baled on station) and "burnables" (I still don't really know what that was for, since incineration is banned out there). Users were encouraged to call the Waste Department for support, and actually the people at Waste seemed to understand and believe in the system (unlike me) so I called them frequently to ask where to put e.g. an empty juice box. To be fair, this system was borne out of the real difficulties of waste management in Antarctica, and I'm not sure I could have done a better job with the UX. (Constraints were that everything went back to the US on a boat, food waste had to be shipped back refrigerated, etc.)