Credit Cards are Scary

This story is one man's attempt to get retailers to check the signature on his credit card slips. He signs all kinds of different names on credit card slips, including "I Do Not Authorize," and no one questions him.

FYI- I used to sign my credit card slips as "Kato Kaelin," but I stopped when I became convinced no one cared.

That site has many other pranks that are also quite funny.