Spoiled, 'cause it's ruining fun.
I, too, fondly remember that which lurks under the spoiler tag!Spoiled, 'cause it's ruining fun.
This is definitely plagiarized with some slight edits from the now-defunct "Zug" site. He had two comedy posts about fake credit card signatures, although I don't recall him ever signing a penis, and there was no electronic machine. He would sign things like "I STOLE THIS CARD" or one time just drew a grid of squares to see what would happen. I remember them fondly.
Also, even if this person just coincidentally came up with a near-identical story, it definitely isn't true/betrays a lack of understanding of retailer responsibility and how credit cards and their signatures work.