On our visit to Venice, we were struck by a couple of signs that were in English-only and therefore appeared to be speaking to American tourists. The funny thing was that they were both about the same thing: picnics! The first one, found on the glass-blowing island of Murano, simply read "No Pic Nic." The cranky guy, in his Guido-black-leather coat on a warm day, only sealed the visual.
The best one, though, was found near a gondola landing that apparently also attracts unwanted tourists. It read, classicly: "Please - No Pic Nic, No Dirty, No Sit - Thank you!" Really, how dirty are we picnicking, sitting tourists?