Presumably, writes Chris in San Francisco, the note-writer “figured that if she didn’t put a note on all each offending bag, someone was going to feel left out.”

Adds Chris: “Admittedly, the Kashi cereal box in the back has been there for over two years.  I leave it just as an experiment in human behavior, but apparently somebody had had enough.”

related: A sign (or ten) that your HR department might have too much time on their hands

“There are many ethnicities crammed into a fairly small area here,” writes John in Singapore, “and sometimes there are…frictions. The red bin referred to in the note (at the bottom of the photo there) is an incinerator for firing up offerings to various deities/dearly departed by Chinese Buddhists. They are all over the place here in Chinatown, and everybody knows what they’re for.”

Without a doubt, John says, “The Korean gentleman using it as an ashtray is provoking his neighbors deliberately.” How…how…what’s the word I’m looking for here?

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Our anonymous submitter was mildly amused when he noticed this little hypothetical how-to pop up in his Facebook feed. But the real kicker, he realized, is that the one person tagged in the note happens to be (ouch) the notewriter’s current roommate.

Adds our submitter: “To my surprise, the girl never commented on it, but I’m sure she got the message — she was called out!”

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The car you drive can say a lot about you as a person.

Sometimes…too much.

(Thanks to the eagle-eyed Russell in Madison, Wisconsin; Alyssa in Pleasant Grove, Utah and Samantha in Lexington, Kentucky for the documentation.)

related: So if I start selling drugs I can drive an Escalade, too?

“One of my coworkers — normally a calm, even-keeled woman — sits near the door of the office,” writes Ali in Minnesota. “When others come in at night to write reports or look up info, they apparently destroy her desk in the matter of minutes. After a series of coffee cups and chair-lowerings, up went this note. Everyone in the office found it so funny they started adding snarling animals to the note. Ferocious!”

While I can understand this woman’s frustration, one thing I’ll never be able to understand is the logic behind highlighting an entire (caps-locked!) message.

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I’ll admit, my first thought upon reading this note — found in the hallways of an American high school — was something along the lines of “Argh, kids today, with their chatspeak!” Can we all agree that adolescent girls are probably the most passive-aggressive creatures on earth?

related: 2 good 2 be 4gotten