Five years ago, Jared Hyams thought it'd be funny to use a crude drawing of a peen as his signature on a voting change of address form, but the government wasn't having it. That's when the fun/struggle began:
"It sparked something in me. I didn't understand if these people were offended or had taken it personally."
What a signature is comes down to the function, not the actual form. Generally, it's a person putting a mark on a piece of paper by their own hand. As soon as you start defining what a signature is you run into problems - if it's meant to be someone's name how do we define that because most signatures are just illegible scribble.
Dong on, dude.