I have seen photos of some good ones, like the "Need money for alcohol.  At least I am honest.", and some like that.  But, i have never seen any truly funny ones in person.

However, the other day, I was at the bottom of the freeway ramp, and the guy had a sign that said:

"I know I'm ugly, but I still get hungry"... :lol:  I was gonna give him something for creativity, but I was 3 lanes away and got a green light.....