And then, of course, performance/persona Marshall Chapman does a menacing version of "I Walk The Line" (as if Johnny Cash needed more menace) and a friend of mine used to do what she termed a stalker's version of "Suspicious Minds". I've also heard any number of remarkably cheety versions of "Folsom Prison Blues" wherein shooting a Reno resident just to watch him die goes past gloating and into an odd sort of squaredance meter.(Though, come to think of it, that could be pretty effortlesly slid into a rap format).
Kris: the anthology was called "Messages" and I assume it's out of print. Students hated it because they enjoy the sensation of spying, I suppose.