It's funny. I recently watched an old episode of The Adventures of Superman, set in Haiti, where an evil voodoo priest is obviously being played by a white guy in blackface. At first, I was was rolling my eyes but then -- plot twist! -- it turned out that "voodoo priest" was actually a white guy in greasepaint! Whom Superman exposes by wiping the makeup off his face.
(Mind you, it's still a stretch that the bad guy's disguise was supposed to fool anyone, but at least the casting wasn't as egregious as it first appeared.)