shamazon
Typing up fake or sham reviews of any product to be found on Amazon.com, in order to mystify, ruin or simply amuse prospective purchasers.

Common entries completely redefine products (genre-wise) or reveal intrinsic plot lines or twists to spoil films, books, etc.
Mephistoles: "Hey, Rupert, What shall I write for this shamazon about The Sixth Sense?"

Rupert: "Tell them Bruce Willis dies at the end."