The best sendup of Lit teachers reading too much symbolism was in the movie "Back to School" and the Kurt Vonnegut scenes.

Diane: Whoever did write this doesn't know the first thing about Kurt Vonnegut!

[cut to Thornton's dorm suite]

Thornton Melon: [on the phone] ... and another thing, Vonnegut! I'm gonna stop payment on the cheque!