“Working in a university library, you get used to a lot of ‘quirky’ personalities,” says our anonymous submitter in Manhattan, Kansas. “So far, this is the only one that has decided to put pathology to paper.”

Dealing with the rantings of your crazy boss or overzealous receptionist is one thing, but what do you do when your office’s resident passive-aggressive note-leaver doesn’t even work there? Casey in San Diego (a.k.a. RunBarbara) says that’s the situation she’s found herself in at her job.

The offender, Sandra, “has met me a total of twice, both times for less than a minute,” Casey says. Yet for some reason, when Sandra (the aunt of the owner) stops by the office once a week to water the plants and drop off supplies, “she leaves these strange notes EVERYWHERE — and she almost always directs questions about said notes to me,” Casey says. “I often have no idea she posts these notes until someone asks me about the odd directions in them.”

Below, a small sampling of Sandra’s delightfully bizarrre directives. (Just click on the photos to enlarge.)

I’d like to think this note was posted immediately following the “potluck”…

related: The return of Thx Sandra!

“I work for a pretty awesome non-profit, where people are amazingly laidback, accepting and non-OCD,” says our anonymous submitter in San Francisco — so this note came as something of a surprise.

Adds our submitter: “I have to admit, seeing the newspaper on top of the toilet tank the previous week had kinda gotten on my nerves too.”

related: oh dear

What’s employee morale like inside Yahoo’s Sunnyvale headquarters, amid all the chatter about coming layoffs, the possible Microsoft takeover, and everything else? well, according to one anonymous Yahoo! employee, in the toilet would be one place to look.

Says our Yahoo! tipster: “First they took away our right to stand on the toilets. Then they took away our right to surf on the john. But now — they’ve gone too far.”

related: Yahoo! — Servicing over a half-billion people…each and every day

Like this phrase, there are a few irritating little pieces of clip art that keep popping up in submissions over and over again. Hovering somewhere near the top of most-wanted list is this pouty little white-gloved dandy.

From the factories of Pittsburgh…

…to the cube-farms of Virginia, this perspiring misanthrope has been spreading his message of intolerance with impunity.

But, once again, it’s a note from a church bathroom (this one spotted by Jess in Boston) that really pushes things to a whole new level of divine didacticism.

Can I get a witness?!

related: clip art crimes

Alexa in Texas works in a graduate lab of five students. One Friday, she says, “our advisor came in around 9:30 a.m. looking for us. No dice: except for one poor guy, we were all out.” When the hard-working crew finally rolled in around 1:30 (or, um, 3 p.m.), they were greeted by this inspirational slogan pinned to the door.

related: Paul Newman, the Franz Ferdinand of the fridge

“My roommate thinks I took her dry erase board when I was 40 miles away the week it was taken,” says an anonymous college student in Tampa, Florida. “She has been leaving me notes like this ALL YEAR.”

God help our poor submitter, but I’m nominating this crazy rainbow of a note for the passive-aggressive hall of fame. (Prize: a year’s worth of anger-management therapy?)

related: Which one of these is not like the other?

“It seems too many people have made love to the office water cooler,” says Lizzy in New York. And some of them, it seems, are getting a little sloppy.

Lizzy says the “Office of Water” thing refers to the fact that “Our office is full of water. Like, the fridge doesn’t have anything but bottled water and Coke,” but I’m not quite buying it. I’d like to think this came from the EPA’s official Office of Water (Benjamin H. Grumbles, assistant administrator).