Our submitter says this note was posted in a Princeton University restroom by his coworker, who had become “completely obsessed with finding out who didn’t flush the urinal after using it.” After posting the note, he began to discreetly check the urinal every time he saw someone leave the restroom.

“Eventually he identified the culprit, and that individual was appropriately shunned,” says our submitter. “At least he kept his oath to God!”

related: Were you raised by wolves? (a flowchart)

According to our submitter, this car hasn’t been spotted in the path since.

related: BAD PARK YOU!

Writes Stacey in Massachusetts: “The church around the corner from my house is famous for the little rants on their sign, but this one definitely takes the cake.” Obviously, texting while driving isn’t cool, but as Stacey put it: “For a church, it just seems a bit…hostile.”

Meanwhile, I just opened up the August issue of Texas Monthly to see this slightly more gently worded version…

related: Sincerely, God

extra credit: Church sign generator

Nadia in Greensboro, North Carolina spotted this gem of a “you break it, you buy it” specimen at a local thrift store. “Apparently,” she writes, “Secondhand Punctuation Has Its Drawbacks? You Can’t Pick And Choose? You Have To Make Do With What You Have On Hand? Handwritten Notes Are Not Exceptions?”

The D.C. tourist trap that Amy visited took a less tentative tack with its signage, though I doubt the “four times is better than one” approach is any more effective.

These two stores, on the other hand, pretty much nail it with reverse psychology.

related: As Davy Crockett once said…

Every day, you watch them, in horror: Those vile, germ-laden, nether-region-wiping creatures who don’t wash their hands after using the toilet. Confronting the offenders directly wouldn’t work, because, well, you’re passive-aggressive, and that’s just not how you roll. So what to do next?

Well, you could dazzle them with some accusatory statistics…

…or attempt to appeal to the altruists in the audience.

And maybe try to lure in the sports fans with the promise of some fun trivia!

If they see through that little scheme, you could try patronizing your patrons outright…

…or just straight-up treat them like four-year-olds. (“Did you wash your hands?” “Yes.” “DID YOU WASH YOUR HANDS?” “I said yes!!!”)

Perhaps even a dash of reverse psychology?

Of course, those less-straightforward techniques just might just backfire on you.  In that case, you could play the bully with THE CLIP ART THAT MUST BE STOPPED.

Or, if your clip-art collection is a bit larger…release the dragon!

Not scary enough? Maybe it’s time to bust out the F word.

Or the even scarier F-word: FECAL-ORAL.

And if that still doesn’t work? Well, I guess you’ll just have to flounce away, invest in some latex gloves, and vow to hold it ’til you get home.

(Thanks to Jen in Houston, Jenni in Spokane, Marley in Pittsburgh, Lindsey in Memphis, Laura in Richmond, and the many anonymous submitters for their contributions.)

related: Five approaches to toilet paper maintenance

extra credit:  “On Washing Hands,” by Atul Gawande

extra extra credit: “Maybe You Touched Your Genitals” Liquid Hand Soap

This delightful note comes to us from the wilds of suburban Orange County, California. “There is a door at my school (a private college) that is constantly propped open,” explains Amy, a grad student. “Up until yesterday, the note on the door said, ‘Please close door.’ I have NO idea about the microwave burning, or what the note writer has against skateboarders.”

Adds Amy: “How does one burn a microwave, anyway? Maybe they put one microwave inside of another microwave?”

“Apparently our growing satellite office has some food thieves,” says an anonymous submitter in Ontario.