in highschool i had on my vw westphalia a sticker with einsteins "you can either promote the use of nuclear power for peace or war" then on the other side i had a Go Nuclear/Go Navy. i had quite a few arguments that i was a hippocrit.
My sister, who I admit is a bit 'odd' used to get into some tiffs in the college town where she lives because she drives an SUV and has her Wicca stickers mixed with her Bush/Cheney stickers. I admit, she's a bit unique-- but its always amusing.