The Gettysburg Address has some whack usage, too. How many folks know what "four score" means? How many people who will tell you they think Picasso is the greatest artist who ever lived could identify a single work? I'm seriously not getting how the fact that pretentious douches will reference cultural landmarks in stupid ways is an argument against teaching those landmarks in schools. Presumably a good number of the 25% who understand your Hamlet quote acquired that understanding at least in part because they read and discussed it in school, no?