The answers to the first two questions have the potential to threaten our very existence. As much as I would like to discuss world-wide destruction and new forms of space transportation, such information is only located at places like the library, NASA Headquarters or the Chinese Embassy. The fact of the matter is, Americans are just plain forgetful. And it's not only car keys that this happens with. People also frequently misplace items like television remote, sunglasses, purses, wedding rings and English 101 assignments in college.
People are always very conscious about where they put their alcohol, even when they're drunk.
Anyway, like I was saying, people are always losing things. For instance, I misplaced my car keys 12 times last month. However, like any great product that's on the market, it does have its downfall. Hmm, come to think of it, maybe I can market this as a psychological weapon of war. Anyway, another problem with the Key-per is that once everyone starts clapping, the darn thing will keep going off, over and over.