It's unlikely that passive aggressive notes have ever helped to diffuse tension in the office.
But that doesn't stop frustrated staff members leaving hand-written warnings in a desperate bid to get their message across - as these hilarious snaps shared on social media prove.
They're largely the efforts of employees seeking revenge on serial milk stealers, or those with a habit of making a mess in communal areas.
One disgruntled woman took the extreme step of labelling each and every item of food that was not hers in the fridge - to make it crystal clear to her colleagues which ones they should avoid.
Another person was fed up with those leaving notes and publicly shamed them for using Comic Sans.
Here Femail rounds up some of the funniest workplace outbursts that have made their way onto the web...
Saying it in ketchup! This anonymous respondent didn't seem very sorry as they responded to a note in tomato sauce
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That didn't last long! This workplace obviously struggled to remain sarcasm free
Putting it in writing! This worker didn't like this sign makers use of the Comic Sans font
A bit over the top! This person wanted people to know which food wasn't hers
That wasn't in the Bible! These co-workers were fighting over whether Jesus would have wanted them to share some Diet Coke
Daves only! One man called Dave helped himself to an offer that appeared to be just for him
Catty co-workers! This person was fed up with her colleagues treating her like a slave
Never-ending passive aggression! These colleagues got into a battle of sticky notes
Go away! This worker made a rather rude sign telling their co-workers to go away
Toilet humour! A worked called Judy had some complaints about the state of the office toilets
What happens next? This microwave was put out of use for good, much to the frustration of the office workers
That'll teach them! An employee called Chad decided to respond to his colleague's catty note with a hilarious prank
Where did they go? This mysterious note led one employee on a treasure hunt
That's deep! One budding philosopher appeared to be having an existential crisis in the form of a passive aggressive note
Too many signs! This company's employees clearly had a thing for making signs
Not a sharer! A worker named Elaine wanted a whole drawer to herself and everyone else had to share the other
No food is safe! This group of angry employees all had their snacks stolen from the fridge
Not listening! This person's rant fell on deaf ears as her colleagues didn't like her complaining
Not interested! This angry employee didn't enjoy getting complaints from his co-workers
Too late for this one! Not one to care about trivial things like spoiled milk, this sassy employee fired back with a punny cartoon
Bending the rules! This cheeky worker printed out a picture of a different kind of Jobs
Just clean the fridge! These workers didn't like all the fuss over a smelly fridge
Not in that way! This funny employee couldn't resist the chance to make a good pun
Getting out of control! This microwave is full of passive aggressive notes from co-workers
Named and shamed! The messiest employees of this company had the pictures stuck on the walls
Getting fed up! This employee left a passive aggressive note for the maintenance staff
Too late! These crafty co-workers were seriously dedicated to annoying this disgruntled colleague
Not the place or time! These colleagues argued over coffee by sticking notes on the wall
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