“Watch out for the idiot behind me” (bumper sticker)

“Watch out for the idiot behind me” is a jocular saying that has been printed on many bumper stickers. “WATCH OUT FOR THE IDIOT BEHIND ME” was printed in the Toronto (ON) Star on October 23, 1989.
   
         
23 October 1989, Toronto (ON) Star, “This bumper crop will stick it to you” by George Gamester, pg. A4:
WATCH OUT FOR THE IDIOT BEHIND ME.
   
Google Groups: de.talk.jokes
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11/13/95
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Watch out for the idiot behind me !!!
     
Google Groups: alt.lifestyle.earth-based
Some of my favorite bumper sticker humor
WW
3/13/01
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Watch out for the idiot BEHIND me.
 
Google Books
Watch Out for the Idiot Behind Me: The Ultimate Bumper Sticker Book
Cider Mill Press
Cider Mill Press, Sep 1, 2007 - Humor - 96 pages
Stick it to ‘em! There’s so much in this world to aggravate us, and this book of bumper stickers—one per page, to peel off—is the perfect way to talk back
   
Google Books
The Laughing Clowns:
A Tale of Finding Love Again by Going Home
By William McInnes
Sydney, Australia: Hachette Australia
2012
Pg. ?:
These days, car stickers are usually trying to be humorous: ‘Watch out for the idiot behind me!’
 
Daily Mail (London, UK)
I have opinions about things! Drivers poke fun at each other and the world with hilarious bumper stickers
By KELLY MCLAUGHLIN FOR MAILONLINE
PUBLISHED: 05:01 EDT, 9 November 2017 | UPDATED: 11:23 EDT, 9 November 2017
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A bumper sticker reading ‘Watch out for the idiot behind me’ makes a fool of the reader, since the reader is likely the ‘idiot’ behind the vehicle.
   
Twitter
i know i’m a lot of feathers and not much chicken
@_ZACK_ZACK_ZACK
“watch out for the idiot behind me” is actually a pretty good bumper sticker
5:58 PM - 7 Sep 2018 from Toronto, Ontario