* ''ComicStrip/LilAbner,'' with its cast of yokels and gullible city-slickers, was quite fond of the trope. In one particularly notorious example, Abner himself was sucked into a machine designed to capture him simply by writing ''"Don't look in here"'' on a face-sized hole in its side.
--> '''[[WhatAnIdiot Abner:]]''' It says, "Don't look in here!" I wonder whuffo'?"
* ''ComicStrip/CalvinAndHobbes''
** Calvin attempts to lure Susie to a spot where he can hit her with a water balloon, but she doesn't notice him dropping (planting) his letter with an obvious secret code until he loudly exclaims to Hobbes that, "I hope Susie doesn't read our secret letter, because then ''all our plans would be ruined''." At which point it backfires spectacularly.
** She also gets him passing notes in class. She tells him to pass on the note, but not to read it first. The note, naturally, says: "Calvin, you stinkhead: I told you not to read this. Susie."
** A more successful version uses a series of "Important message, this way" signs, culminating in "Important message : Look out!" and a tossed water balloon.
* ''ComicStrip/{{Dilbert}}''
** In one strip, Dilbert tells the PointyHairedBoss not to touch the "prototype", or he'll be shocked. Naturally, the boss's thought bubble reads "Must touch", and he touches the thing, and gets zapped with a ridiculously huge surge of electricity. In the third panel, Dilbert tells the boss not to touch it a second time, and the boss, who is severely charred by the first shock, thinks [[TooDumbToLive "Must... touch... second... time."]]
** Wally makes use of this trait in later comic, when Asok accidentally erased the entire customer database. He gives the boss Asok's laptop, and says that this is an unstable prototype and should not be touched. When the boss immediately does, Wally blames the boss for just now erasing the database.
** In another strip, Wally - again - tells Dilbert, with the PHB listening, that studies show you can identify a natural leader by the way he says the word "gullible". This causes the PHB to start yelling "GULLIBLE!" repeatedly at the top of his lungs, and Wally to say, "Sometimes I love my job."
* In one strip of the newspaper comic ''ComicStrip/{{Frazz}}'', we find out that the eponymous janitor has installed a box designed to make the kids ask, "What's that for?" so that he can tell them to leave it alone. The box actually ''doesn't'' do anything, except to distract them from the fire alarm.
* [[http://www.broadside.net/M09051119.htm This]] ''Greenside'' cartoon. A marine stands in the middle of a room full of signs in bright colours with enormous lettering telling him not to press the button. He is pressing a large red button. Two scientists just outside the room are looking in through a window and the first is telling the second "I told you so."
* In a ''PricklyCity'' Sunday cartoon, Winslow sees a button with a "Do not push" sign. After some careful idleness, he pushes it in the penultimate panel. In the ultimate one, he complains, "If you break the rules you deserve a boom."
* ''ComicStrip/TheFarSide'' had a cat following signs saying "cat fud" leading into a washing machine, behind which a dog was lurking in breathless anticipation.
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