National Lampoon did it in 1971, and "'in 1991 or 1992,' Sam Henderson and some unnamed friends put together a zine titled The Lighter Side of Copyright Infringement, featuring Berg MAD art with rewritten, raunchy words in the balloons. (Henderson is proud that they found a font similar to MAD’s mechanical typography.)" And:
The editors of MAD began to practice Berg-détournement themselves when they introduced (in #487, March 2008) their “Darker Side of The Lighter Side” feature, a recycling of Berg’s images with new word balloons. Now Berg’s delicately-drawn characters deliver jokes about murder and sex offenders in the pages of the magazine itself. Late capitalism can recuperate and profit from anything, including the subversion of its own laws about property ownership, but the inspiration for “The Darker Side of The Lighter Side” goes back to the earliest comic-book issues of MAD, where Harvey Kurtzman wrote new, supposedly funny word balloons for previously published E.C. horror stories (“Murder the Husband!” / “Murder the Story!” MAD #11, May 1954) and slapped captions on pictures of babies (“Baby Quips!” MAD #13, July 1954) to save money on contributors’ wages and keep ahead of crushing deadlines.