“This vehicle protected by anti-theft sticker” (bumper sticker)

“Vehicle insured by Smith & Wesson” is a bumper sticker purporting to alert potential thieves that the vehicle’s owner carries a gun (Smith & Wesson). “This vehicle protected by anti-theft sticker” is a jocular alternative that has been printed on many bumper stickers.
 
“This Car IS Protected With An Anti-Theft Sticker” was cited in print in 2001.
 
     
Google Groups: alt.video.dvd
Protected by anti-theft security system
Dave
1/12/01
(...)
I think I am going to start putting stickers over the edge of the door and body of my car near the door handle.  Lable them “This Car IS Protected With An Anti-Theft Sticker”.  Since they work so well for DVDs you know they will work for cars. 
   
Google Groups: rec.music.gdead
best bumper sticker
Steven Martin
12/9/02
“Instead of being born again, why don’t you just grow up.”
“Jesus Loves…everyone else thinks you’re an asshole.”
“This car protected by anti-theft sticker.”
   
3 March 2003, Atlanta (GA) Journal-Constitution,  “The Vent,” pg C2:
Seen on bumper: “This car protected by anti-theft sticker.”
     
Google Groups: rec.motorcycles.dirt
Motorcycle quotes
Keystroker
8/4/03
More like bumper stickers but anyway.
(...)
THIS BIKE PROTECTED BY
ANTI-THEFT STICKER
 
Twitter
Sponno - AskNice.ly
‏@sponno
Great sticker for car window “This vehicle protected by anti-theft sticker” http://urltea.com/22eh
1:56 PM - 11 Nov 2007
 
Twitter
Kris Sheppard
‏@KrisSheppard
Sticker on my sister-in-law’s car: “This car protected by anti-theft sticker.”
9:17 PM - 30 Apr 2009
 
Google Books
Shuttlecocks, Polar Bears & Noodle Soup (The Pocket Edition)
By Stu Wilkie
Lulu Publishing (Lulu.com)
2010
Pg. 54:
This vehicle is protected by anti-theft sticker