That's the thing, a house cat wouldn't understand the danger of running under a running truck and as "curiosity killed the cat" the uninitiated feline would be curious about the spinning thingy and then the inevitable! Then you would have to post sad pictures on the "oil burners.net pet pics" thread of the cat you lost to your IDI. And then there would be an uprising, and
@hacked89 couldn't buy the website and perpetuate it because of the animal rights people who got laws passed to outlaw IDIs because of negligence.