You can’t mean that!

I remember assigning Jonathan Swift’s “A Modest Proposal” in a composition course for college freshmen. One of the students who read it was aghast at the idea of selling children as food. Somehow she’d missed the satire. It’s tough to pull off good satire in writing, where it shouldn’t be necessary to add cues (wink, wink, nod). Here’s an example that’s newer than the 1700s, and not in The Onion.
Scientists: Earth Endangered by New Strain of Fact-Resistant Humans – The New Yorker.
http://www.newyorker.com/humor/borowitz-report/scientists-earth-endangered-by-new-strain-of-fact-resistant-humans