The Vassar Library could be a model for J.K. Rowling’s work:

A closer look at the jarringly contemporary containers along the mid-left edge of that picture:

Pop quiz: How many books did they find in the trash before they added the placards?
Bonus: How much did that reduce the burn rate? It’s surely still nonzero, because nobody reads instructions. Right?
Double bonus: Does the real book drop sport a “This is NOT a trash can” placard?
They really tried to make them look like book drops though. Its hard to believe that anyone who would have gone the library to get a book in the first place would have made the mistake of placing them in the trash versus a real return.
You’d like to believe that, but …
There is a reason why mailboxes are all the exact same color.
I’d be hard-pressed to testify when I last pulled one of their handles, but they’re blue, with occasional olive-drab “this is not a mail box” carrier storage units.
You’d never use one of those as a trash can, right? [sigh]
If you don’t want it mistaken for a book drop, don’t make it look like a book drop…
You get the odd brain-dead behavior every once in a while. A good friend “mailed” his keys once. The local taqueria has a tray for silverware to the valued customers who rate better than plastic. (We count, but I better not toss any.)