What class clowns know that more polished artists tend to forget is that ignorance is funny. Too many professional artists are cursed with good taste. They just can't bring themselves to stoop to the level of what really makes people laugh. Thank Goodness Don Martin (above) didn't have that problem.
Of course you could argue that if they were willing to stoop they couldn't do it anyway. Class clowns are a special breed. Most people couldn't do it if they tried.
Animation studios are always trying to do funny shows without hiring funny or creative people. I think that practice started in the 60s when New-Agers spread the belief that everybody is creative and only needs to express it. After 40 years of decline in the arts, isn't it time that we laid that theory to rest?
Beavis & butthead, South Park, and the Simpsons certainly proved that there's an audience for ignorant drawing, but my own taste runs to the better-drawn examples of the genre like the kind of things Bob Clampett, Tex Avery, Bob Nolan and John Kricfaluci did (See John's "Naked Beach Frenzy"). They worked hard to keep the class clown sensibility in 3-dimensional, constructed characters.