In 1974, a Clevelander wrote the Browns complaining of the menace posed by the then-fad of throwing paper airplanes, and implicitly threatened litigation. The Browns' response is just about the most awesome thing ever committed to paper.

The Greatest Letter Ever Printed On NFL Team Letterhead

The Greatest Letter Ever Printed On NFL Team Letterhead

Absolutely Epic 1974 Letter From Cleveland Browns to a Fan [Cleveland Scene]