In Belgium, missing four consecutive voting opportunities will lead to the loss of your right to vote for the next 10 years. In case that sounds like a reward, it also means your job prospects go way down, as the civil service won't even look at your resume. Refusing to be democratic can also hurt your wallet in Bolivia, where failure to show your "I Voted" card at the bank can prevent you from accessing the money you already worked for. And if you refuse to vote in Italy, good luck finding a daycare center willing to take your kids while you're off not voting.
In Bolivia, a vote for literally anyone is a vote for paying your water bill.
But no country penalizes voter apathy harder than Greece, whose punishment, in the tradition of their ancient ancestors, is deliciously ironic. Not voting can mean being denied a driver's license or even a passport, your fate being to forever remain trapped in the country you didn't care enough for to vote. That might seem a bit harsh, but Greece did invent democracy, so they get to take not voting personally.