I’ve always been bothered by those "Property Of Blank University" t-shirts that used to actually be the loaned (or stolen) property of college athletic departments but have now become popular enough that you can find them, for sale, in nearly any university store or gift shop in the US. Few people would assume that somebody with a "Property of" shirt had stolen their clothing. In fact, it’s often impossible to find the shirts except on sale anymore — and rarely from universities themselves.
Here’s my response.
For those that don’t know (and that’s certainly many), Pierre-Joseph Proudhon is the nineteenth century French anarchist and mutualist most famous for saying, "La propriété, c’est le vol!" In English: "Property is theft!"