Fans of Pee Wee Herman will remember a video that played on his original stage show (later an HBO special) about lunchroom manners. “Mr. Bungle” (later an insane rock band led by genius/madman Mike Patton) was the central spectre in shaming children into behaving. Of course the good folks at The Internet Archive have tons of this sort of thing. It makes for multitudinous opportunities for MST3K-ification.