I agree that the exact level of punishment may be disproportionate, but where do you get "hurt no one"? An invalid vote cancels a valid one. Is disenfranchisement not a big deal anymore?
"Ultimately, her vote didn’t even count. Provisional ballots are subject to review, which ultimately led to an investigation of Mason."
And "no franchise" does not imply "not human", unless you're saying that every country should allow foreigners to vote in their election or else they're deeming them non-human.