The image shows two humorous warning signs: one on the left reads "Warning Low Flying Owls" above a "Lost Chihuahua" sign; the one on the right warns, "This property is protected by highly trained chickens.

Some of these warnings contradict themselves, others are victims of bad design, and a few just seem to have given up entirely. Whether it’s a safety notice floating in a pool or a “do not enter” guarding a restroom, each one proves that even good intentions can go spectacularly wrong. So sit back and enjoy these twenty examples of warning signs that managed to fail their only job in the most hilarious way possible.

1. It seems like they should warn people a little bit earlier

A yellow caution sign reads "Trail unsafe when under water," with floodwater nearly covering the bottom half of the sign and water surrounding it, indicating severe flooding.
teachmelmwilling69/via reddit.com

2. Well, thank you for the warning

A white roadside sign reads: "WARNING REMOVE DENTURES TIGHTEN UP BRAS ROUGH ROAD - NEXT 5 MILES." The sign stands in a rural, grassy area with trees in the background.
teachmelmwilling69/via reddit.com

3. “Please beware, his aim is accurate.”

A warning sign with a photo of a chimpanzee reads: "WARNING. Zeb throws objects. Please beware his aim is accurate." The sign is displayed on a metal fence.
r3tronic/via reddit.com

4. What do you consider a short blast?

A yellow sign reads: "WARNING! Evacuate the island if you hear 8 short blasts." The bottom right corner says "NorthWestern Energy." The sign is posted outdoors with trees and grass in the background.
epicbruhboy12/via reddit.com

5. Dang, they even have helicopter sharks in Australia?

A warning sign at Mindarie Beach lists dangers: dangerous current, submerged rocks, no lifesaving service, sharks, snakes, shallow water, and dumping waves, each with a caution symbol. Ocean visible in the background.
khos_awa/via reddit.com

6. “Or risk having a wrench tossed at your head.”

A warning sign with a stick figure hitting another in the head with a wrench. Text reads: "WARNING: TO AVOID INJURY, DON'T TELL ME HOW TO DO MY JOB.
tellingbog/via reddit.com

7. These two conditions are totally related

A blue sign on a metallic surface reads: "Employees with exposed underwear are not allowed to use airpods/earphones/speakers." There is an Ecolab label and a warning sticker below the sign.
gryphonsk/via reddit.com

8. This is satire… right?

A posted sign reads: "WARNING: Unattended children will be captured and used for medical experiments." The sign appears to be displayed indoors on a wall behind glass.
userdeleted/via reddit.com

9. The kindest way to tell someone they suck at parking is with cheese

A printed warning note on a car windshield reads: "Next time you take up two parking spots... I will line your car with slices of cheese. Consider this a warning." It includes images of cheese and a car, with a label "Gonna smell bad.
gryphonsk/via reddit.com

10. It looks like he escaped on his own…

A white cup is placed upside down on a desk with a hole cut at the bottom. A pink note on the cup reads: "WARNING... Huge aggressive spider under cup...! Do not pick up until ready to squish it!
material-practice-58/via reddit.com

11. “He will bite you so hard your grandchildren will feel it.”

A printed sign on a car window humorously warns about a chihuahua inside, describing it as possessed and aggressive if disturbed. A small brown-and-white chihuahua is visible looking out from behind the glass.
liechemical9700/via reddit.com

12. I wonder what inspired the necessity of this sign

A sign with illustrations showing not to stand on the toilet (red circle and slash) and to sit on the toilet (green circle). Text below reads: “DO NOT STAND ON TOILET.”
userdeleted/via reddit.com

13. People might need more time than that, though

A large yellow sign above a road reads, "IF YOU HIT THIS SIGN, YOU WILL HIT THAT BRIDGE," warning drivers of the low clearance ahead. A brick bridge and houses are visible in the background.
userdeleted/via reddit.com

14. Bathrooms on Halloween give mixed messages

A men's restroom door covered in yellow "Warning: Just Buried Alive!" tape. A sign on the wall says, "The bathrooms are OPEN. These are Halloween decorations :)
memorablekidsmoment/via reddit.com

15. That’s just sad

A street corner with a yellow road sign reading "WARNING LOW FLYING OWLS" and a handmade sign below saying "LOST CHIHUAHUA" with a phone number beneath it. Trees and a curving road are in the background.
material-practice-58/via reddit.com

16. The seagulls out there must be ruthless

A printed sign reads: "ONCE THE FOOD IS GIVE IT TO YOU IF A SEAGULL TAKE IT FROM YOU WILL BE NO REFUNDS THE SEAGULLS DON'T WORK FOR US SORRY FOR THE INCONVENIENCE." A photo of food is partially visible beside the sign.
one3tx/via reddit.com

17. I wonder how many times it happened before they put this sign up

A sign on a vending machine shows an endoscope stealing chips, warning: “Endoscopy equipment is NOT to be used for stealing food from the vending machine!” Bags of chips and snacks are visible in the machine below the sign.
iatetoomuchchicken/via reddit.com

18. Why does electricity look like such a nice guy, then?

A warning sign shows a cartoon electric character threatening a scared child with a lightning bolt. The text reads, "WARNING: Remember kids, electricity will kill you!" Black string lights hang in front.
aggressivemongoose54/via reddit.com

19. “Please feel free to test this theory.”

A wooden sign on a fence warns about a bull in a grassy pasture, with autumn trees and a blue sky in the background. The sign humorously states the bull can run across the field faster than a person.
howardkinsd/via reddit.com

20. You know chickens are related to velociraptors, right?

A weathered sign on a wooden fence reads: "WARNING: This property is protected by highly trained CHICKENS. Not responsible for injury or possible death," with images of two chickens.
bubble_babe_oooooo/VIA reddit.com

Want to see more hilarious signs?

Check out 20 Silly Signs People Left For Their Roommates, or take a look at 20 Halloween Signs That Deserve a Candy Reward for Effort Alone. Finally, if you want to see signs that provide hilarious information, check out 15 Funny Signs That Provide Far More Than Boring Information.

Meet the Writer

Patrick is a writer based in upstate New York, where he grew up and still calls home. Over the past year, he’s been diving deep into storytelling, especially tales rooted in history, the Wild West, lost treasures, and ancient artifacts. He’s also drawn to unsolved mysteries and whatever the internet can’t stop talking about.

Whether it’s a centuries-old legend or a bizarre internet rabbit hole, Patrick is always chasing the threads of a compelling story. When he’s not chasing stories, Pat’s probably hiking mountain trails with his dog, exploring new corners of the U.S., or doom-scrolling between hangouts with friends and family. He finds inspiration in nature, forgotten places, and random conversations—anything that sparks curiosity. Whether it’s city streets or backcountry paths, Patrick’s always on the lookout for the next great story.