Stop cats peeing on your car
 

or you could just bite their genitals off

This has inspired some ideas. I like cats, but I hate my neighbors cats because they keep scratching my cars.

Reminded me of the Blender Defender:
http://www.plasma2002.com/blenderdefender/

for those who dont like clicking much.

Such an entertaining video, just so much win.

I have got to make something like this.