Back in the 60's some wag put out a bumper sticker that said "Honk if you are Jesus." I actually own a bumper sticker that says "I brake for hallucinations" but have never put it on for fear of it being exhibit A if I ever have a fender bender in that car. But my favorite, hands down, is "Visualize Using Your Turn Signals."
I blame Portlandia for everyone thinking Portland had the keeping weird slogan first. If Portland and others who copied the slogan are so artsy, you'd think they could come up with original slogans. Austin all the way.
"I ♣ my kids."
i tried grandma for the dogma one..