If parties are corrupt enough to require a picture, and voters willing to engage in this corruption, how do you, realistically, prevent this from happening?
That the Mafia can buy people to vote for their preferred candidates I think shows a failure of the political class. Why haven't politicians been able to deliver a government where what they're proposing is more valuable than a few dozen to hundreds of euros?
Here in Italy for example it's forbidden to bring your smartphone into the voting cabin, because the Mafia was asking for photo proofs.
So esrauch found a great counter to my idea.