I’ve always thought that credit card signatures were a bad form of payment validation, but this is ridiculous. This prankster here decides to see how far he can go with credit card signatures before anyone calls him on it. First he just modifies his signature a bit for a more artistic look. Then on another purchase, he just scribbles randomly on the line. After that, he decides to sign with a grid. Next, he signs with an X. Then he signs with a stick figure drawing. Anyway, he kept on running with more and more signatures that got crazier and crazier. Then he goes so far as to test the advice of credit card companies in his signatures. Eventually, he finally gets called on it, when he tries to buy 3 HDTVs from Circuit City under the signature “not authorized”.