That’s a good one, Postcards. 
To Full Metal Lotus:
*Real People * showed this combination:
ALIEN
MEATBALLS
ESCAPE FROM ALCATRAZ
As for yours: I never did trust those Fly Gods.
The only one I can think of right now is from when I lived up in Auckland.
One of the local prostitutes used to stand outside a computer shop - called “Mr Floppy”.
Our local paper ran a story this week with the headline “Pope apologizes for sex abuse” (Or maybe “Pope doesn’t apologize for sex abuse,” I don’t remember.)
What I do remember is that they accompanied this story with an AP photo of him bending forward to receive a toddler being held up for him to kiss.
On the door of a Men’s room, there was a sign saying “Firehose inside”. That had me laughing for a while.
I was searching for a photo I saw once of a group of nuns crossing in front of a billboard so just “Virgin” was visible. Couldn’t find it, but these are fun:
http://thegreatseparation.typepad.com/newsfront/bikerNuns.jpg
I once saw two signs placed together:
JESUS SAVES
BLUE CHIP STAMPS