There are stupid products. There are daft products. There are products that make me want to tear out my own (non-existent) hair. Then there's the Inflatable Unicorn Horn for cats.
I just know that if I tried to strap this thing on one of my moggies, I'd lose some arm flesh in the process, and I'm pretty darned sure that unicorns are meant to be friendly, magical animals, not spitting, snarling bringers of clawed death. [Amazon via ToplessRobot]