Putting up a sign may seem like a useful way to get people to follow directions, but it also risks teasing pranksters who can not resist the opportunity for intelligent comment.
Bored Panda has shared a gallery of hilarious sarcastic responses to posters that remind people who should wash their hands or warn about shortages of staff.
In response to a sign that offers a $ 50 reward for a lost iPod Touch, someone posted an identical notice in the same window that offers $ 51.
On a sign announcing that a printer was temporarily in place, an ingenious guy posted a philosophical note, saying: "In the most general scheme of things, we're not all."
And another made his own addition to a sign with a cup and cutlery that indicated that he should not eat or drink, with a note: "Do not eat coffee with a knife and fork, you will make a mess".
People from all over the world contributed images of fun answers to the Bored Panda ads. One person covered a warning on the food with a note against eating coffee with silverware after they saw an opportunity for a witty comment
Rivalry! Seeing a $ 50 reward for a lost iPod touch, another person took out the big guns by offering £ 1 more
Please be nice with this door! Another smart guy scoffed at a warning that opening the door will deactivate the alarm
False advertising! In response to being asked to recycle, one person printed a count of corrected steps from the distance to the container
Not very soft! An angry neighbor who complained that someone smoked marijuana in common areas received an unexpected solution
They are many bills! Clinton, Murray, Gates and even William Shakespeare ended up in an impromptu gallery of homonyms
You can not turn your back for a minute! At least this office worked must have felt appreciated when they returned from a break
It is a valid point! Someone was not buying the explanation that a piece of rectangular wood with a knob is not a door
On your bike! The owner who was looking for his stolen bicycle was no doubt suspicious when this notice appeared along with his request for information.
They have a point! One person questioned the increase in the price of Coke Zero without sugar in response to a notice highlighting the sugar tax.
He must be a philosopher! Another individual wrote a witty note in response to a note about a broken vending machine
It must have been boring! One prankster claimed that they had waited 45 minutes for someone to come and wash their hands.
An ingenious student printed a Google definition in response to a sign that declares Education is a verb that requires action
One person left a note questioning the meaning of life in response to a notice that the office printer would not stay in its current place.
Another individual took the opportunity to place his chewing gum on an image of a container after a poster was placed against placing chewing gum in the urinals.
A hungry person wrote a sarcastic message for a store that closed due to a shortage of staff
Another person made fun of a message from managers against leaving objects on top of the office fridge