13. Dark Humor
Designer: Colonel George S. Patton
U.S. Army Col. Patton sent a heartwarming greeting from the front lines in 1968, complete with a stomach-wrenching photo of a pile of dead, dismembered bodies Viet Cong soldiers. The inside read, "From Colonel and Mrs. George S. Patton III - Peace on Earth." Distasteful doesn't even begin to describe it.