The first time was some time in the early 1990s. I was driving to work and saw a beat-up Mitsubishi pickup truck with a big "UNION YES" bumper sticker on the tailgate. I pondered--and laughed at--the irony (or stupidity) of proclaiming your love of your union from the back end of a vehicle produced by non-unionized workers.
There have been others. One of my favorites was in Cedar Rapids, where some person who was in the IBEW (International Brotherhood of Electrical Workers) had a Nissan Maxima with a big union bumper sticker on it. I parked somewhere behind that car every other Saturday when I'd go to a friend's house to play D&D.
Today I saw a Ford Explorer with a big "UNION AND PROUD OF IT" bumper sticker on it. It was another IBEW sticker, and there was a dark line across the big red "UNION".
--hmm, must think of a joke or comment about the appropriateness of writing "union" in red letters...
When we were stopped for a red light, I saw that the dark line was in fact made up of text. It said:
DO NOT DISPLAY THIS ON AN IMPORT
Someone's finally getting a clue.