all kinds of signs.  out in the country you see construction zones that say slow,  35mph.
i even saw one that was a standard orange diamond that looked like it was hand painted by a child with the words.
"please slow down, my daddy works here".  
in the city it's "SPEED ZONE ! FINES DOUBLED!"

DWI is another one...
please don't drink and drive becomes. DRINK DRIVE GO TO JAIL!!!

i guess i need to move out of town as i am tired of being threatened.  

Here in San Diego there are signs on I-5 that read "Cruise Ships Use Airport Exit".

Going accross the Brooklyn bridge a few years back I remember a sign saying "DONT EVEN THINK ABOUT PARKING HERE". I asked the driver who put those up as I thought they were funny as hell. He told me the city did. Sure enough I seen a few more on the way to the hotel. Pretty funny.
CH