My generation always touted the challenging of authority and, I must say, it’s ingrained in me. I like a bit of a rule-breaker.
Maybe that’s why I always smile when I see that someone shows a sense of humor by challenging the rules a bit.
Almost all the exterior public walls of Florence bear these signs that essentially state: “it’s forbidden to put graffiti” on the wall.
I honestly don’t know how many English speakers even know what the subtle street signs say.

But, it is delightful to note that someone not only noticed the signs, but felt compelled to suggest a little rule breaking.
I admire a sense of humor, wherever it shows up!