Thesis: the guy pooping is a traditional element of the nativity scene
Antithesis: government sponsored nativities shouldn't depict crime
Synthesis: keep the guy, but add a police officer, writing the guy a ticket
https://en.wikipedia.org/wiki/Caganer#Controversy_surroundin...
Having now done a bit more research than I care to admit to, this book, particularly the page 14 sample, suggests nuance rather than pretext, particularly that reduction of public urination was a secondary benefit that became a primary benefit after public lighting:
https://web.archive.org/web/20231001094443/https://londonist...
I took the liberty of stalking you. I bet you if you e-mailed/visited either of the two people with "Italian Renaissance" here, they could probably directly help you answer your question: https://history.washington.edu/people/faculty
I spent a bit of time trying to answer that question (because I enjoy the exercise of it), and it looks like this would probably be an easier question for a speaker of Italian to answer.
I eventually found this book: https://www.lespressesdureel.com/EN/ouvrage.php?id=11065
The sample pages of that book suggest there is not very much authoritative information on them and I didn't see an earliest known date of construction of them.
https://www.venice-carnival.org/en/approfondimento/3/history...
That seems to suggest the middle of the 15th century is the answer to your question since the profession of codega appeared at the same time they were built according to the first article.
This seems to be relevant too: https://journals.openedition.org/chs/148?lang=en
> it's said that the inclined casts of mortar also had the task to maintain a certain public decorum and therefore prevent Venetians from urinating in the corners of the calli.
The "education" being when someone pisses on it and finds out what happens?
As it wouldn't be hard to stand on one in the shadows.