I sign smiley faces. It always gets a smile out of cashiers that are paying attention.
I once scribled on the signature line for a good 30 seconds, it looked nothing like a signature. Nit a single fuck was given by the machine or the lady at the register.
Thread title is blowing this out of proportion btw. It should read "OG'er draws cock and balls when signing for credit card purchase." I have been drawing shit on those for years. Faces, words, scribbles. Usually a smiley face but whatevs... Just sayin.
I've been doing this for years. It's even better on the paper ones because you have a bigger canvas. I once got into a big argument with the arab guy at the gas station. Apparently, he didn't believe me when I told him that my signature was an old man bending over in the bathtub.