Could it be that Bart's donut-loving dad brushed by a tag inspired by the eccentric MF Doom in an episode of The Simpsons all the way back in '93? Well, the obvious answer is no. Although it looks similar, the etching on the wall at the end of the above clip differs from Doom's writing...and obviously is missing the M.F. in front of it. Even more obvious is the fact that the ex-Zev Love X didn't debut his metal faced persona until several years after the original air date of the show. But even though this is clearly a coincidence rather than a conspiracy, it's still a pretty cool thing to see.
(Props to ALANGORT for the upload.)