I couldn't find anything too funny or unique nor did I see any unique/interesting signs in the past few weeks. Here is what I have:
I found the first sign interesting because of the misleading information on the sign.
While in Rome last summer, I decided to check out the Palazzo Barbarini. Because it was Monday, I was not sure if it would be open. I met a nice Italian man who was also standing outside the gate wondering the same thing. It looked like it might be open so we both headed toward the ticket door. There we saw the sign: "aperto tutti i giorni/open every day 9-19:30" AND THEN underneath: "chiuso lunedì/closed on Monday". Now, please explain to me how this sign makes sense. After we read: "open every day", we both were excited that it was open even though it was a Monday, but then we read the second line and realized that it was closed. We both shook our heads in amazement over the conflicting information. We even went as far as the entrance in hopes that the "open every day" part of the sign meant that it was open. As we were leaving, an American man and his son came walking up. I told them that the museum was closed. They asked why and said it wasn't Sunday. I replied, "No, it's Monday".
I found this sign interesting because of the name (also taken in Rome).