"Items on Amazon.com that you cannot (or at least should not) buy". My favorite is the ACME Rocket Launcher, which includes the following "user review":

I love my ACME Rocket Launcher, and I highly recommend it for anyone with a pesky roadrunner problem*. Quality craftsmanship, easy to use and just an all around good product.

*Not recommended for coyotes, if you are a coyote DO NOT BUY THIS PRODUCT!!!

(Via Waxy.)