Hey, here’s some advice! If you’re looking to improve your relationships with your roommates, communicating through the erasable whiteboard might not be the most effective way to go.

(Above, from a sorority house in L.A.; below, from a shared apartment in Chicago.)

related: Facebook, another poor medium for mediating roommate disputes

So, which of these warnings would most readily scare you into compliance?

Exhibit a) from an alley in York, U.K.

Exhibit b) from a sharehouse in Australia

or Exhibit c) spotted by Robert on a film shoot in Los Angeles?

related: Wishin’ and hopin’

“The other morning,” says our submitter from Los Angeles, “my boyfriend found this typed (on an honest to goodness typewriter!) note left for him on his windshield.” (Another car on the block with out-of-state plates had a similar message.)

“We’re not sure if the WeHo suggestion was meant to be homophobic or to imply we should be hanging out with our pals Heidi and Spencer at Hyde. Since we are neither gay nor from the cast of the Hills, it’s hard to say.”

related: I’m gonna say this in the nicest way possible: don’t park in my spot.

Exhibit a) The “urban” example, from the Silver Lake neighborhood of L.A…

Exhibit b) The equally ineffectual suburban cousin of exhibit a, from “a quiet, small community in San Diego where the residents are basically all over 50.”

related: bleak house

Writes Matt in Los Angeles: “I went to get some of the 2% milk I keep in our communal work fridge for my coffee, and BAM! — front and center was this lovely.”

related: And I’m singing “uh oh” on a Friday night

Jennifer in Echo Park admits that she stole this note under the cover of night — she found it stuck with silver electrical tape to the back of a battered electrician’s work truck — BUT, she contends, “I would never ever steal someone’s leather pants (out of their truck). I am not a monster.”

Meanwhile, Sam in Pomona snapped this photo at the local Wal-Mart. Will this persecution never end?!

related: I know where she lives

Says Corrine in Los Angeles: “I walked into my friends’ building and saw these posted ALL OVER.” (Trifling much?)

related: come get some

Nate’s sister Heather found this note (written on a bus schedule) outside their house in Los Angeles. “I’d like to think Dan took a bus to surprise Roberto, only to be given the cold shoulder,” Nate says, but we can only speculate about the nature of Dan’s attitude towards the future of this relationship. (Zen? Desperate? Really, really flexible?)

Adds Nate: “I particularly appreciate how he gives Roberto the option to improvise.”

related: Tant pis, mon amie