I don’t either.
:dubious:
But I will probably end up doing a :smack: when it is explained.
Here is one I saw yesterday: Jesus is my homeboy
It’s a Bug, you see. But it’s not a bug, it’s a feature. (Y’all aren’t Mac users, by any chance?)
There was one running around town a few years back…bright yellow VW beatle with “Y2K” painted on the sides. Always made me grin.
Saw a good one just this evening, on the back of a Jeep off roader. It said “If you can read this, roll me over”, and it was upside down! 
Obviously not a bumper sticker, but I’ve seen a lime green Bug around here with a license plate that says, “APHID.”
Not exactly a bumper sticker, but the biker with “if you can read this, the bitch fell off” written on the back of his leather jacket was just classic. Bumper stickers are a very rare sight here but I saw and loved one on an acient Lada Sport, saying “I’d rather push my Lada than drive a Musso”. I’ve always thought “honk if you want to get dragged out of your car and beaten” would be nice.
“Keep Round Rock mildly unusual”
You have to live in the Austin area to get it.
I saw:
I’d rather hunt with Dick than drive with Ted
On the back of a four-wheel drive pickup:
I’m not a real cowboy
I just found the hat
DD
LOL! I love that one! I wonder where he got it!
I knew someone who had a Buick Skylark (remember them?)
Her license plate read “Odetoa.”
Think about it. 
How about “God protect me from Your followers”
Only saw it once about 2 years ago, but it was great.
Remember when those “I [heart icon] my [insert dog breed here]” bumper stickers were all the rage?
Somebody was selling circular stickers with a picture of a big wood screw just the right size to cover the heart icon. I had a lot of fun with those stickers.
I always wondered how long it took before the owner noticed his/her “improved” sticker and how many chuckles other drivers got before they noticed.
Net I think that mischief added more humor to the world than it did anger. Which is exactly the definition (well my definition anyway) of a good prank.
My favorite was “Eschew Obfuscation.” I had to look it up when \I got home.
I second this one! I remember seeing those it after Pat Buchanan’s nortorious speech at the 1992 Republican National Convention.
My favorite: Reunite Gondwanaland! I saw it in a university parking lot near the Earth Sciences building. 
Another great one I saw was a USMC window decal[sup]1[/sup]. The context is important - the car had a Purple Heart licence plate that read “WARSUX”.
Another: “Honk if you like sex!”. I saw this one when I was driving with may parents and siblings. Us kids were in our early teens. We spotted the bumper sticker and all of us, parents and children, were giggling. While we passed the car in question, TypoEmperor started honking, and all of us waved. The older couple in the other car looked puzled for a moment, then starting laughing. We figured they borrowed the car from one of their kids, and forgot about the bumper sticker. Still brings a smile after thirty years[sup]2[/sup].
[sup]1[/sup] For non-USA Dopers, that’s the United States Marine Corps.
[sup]2[/sup] How in the heck has it been thrity years since I was a teenager? I guess I should stop acting like one …
I always liked this one:
“MY SON IS INMATE OF THE MONTH AT MCI-CONCORD”
In Arabic looking script Proud Infidel
Don’t Mess With Texas!
Cause that shit’s got the AIDS, yo.
smuck fog