In 2022, Margaret Messerlie went to vote in Houston County, Georgia. She selected her candidates on the machine, which then printed her ballot to be deposited in a scanner to count her vote. But first, having been swayed by conspiracy theories about rampant election fraud related to voting machines, she used a pen to scratch out the Q.R. code on her ballot that the scanner uses to tabulate votes. “I was just making a statement to myself hoping it might go through anyway, but of course it didn’t,