Sometimes when I hear discussions of how the web makes it easy for students to cheat, I recall a high school classmate whose academic fakery might actually have been uncovered if the Internet had been around back then.
To complete an assignment for an English class, he once turned in (as a poem) the lyrics to a pop song that was already a golden oldie by that time. I can't swear to it, but I think it was "Mr. Dieingly Sad" by The Critters.
The teacher in question was someone unlikely to have total recall of minor Top 40 hits.
Don't know how many times he did this. But he probably got caught eventually. Criminals who like to blab about their exploits usually get nabbed sooner or later.