At this point it wouldn't hurt to randomly toss in a general easy question about the party-program when voting.
Voting should be 21+ ( or even 25+) anyway and not 16 or 18, these people generally are subject to biased media or teachers these days, you'll find it hard pressed to find multiple 18 year olds per class that have formed their own opinion and not just offer you their learned opinion.
There's a reason the left parties always try to lower the voting age while not being able to come up with an actual good reason for doing so; the younger, the more susceptable for brainwashing and biased reporting / group pressure. (They know full well the teacherworld is full of their own, and they influence the students).
For example crazy leftists these days, they'll tell you the earth is dying etc, but they also tell you people don't earn enough and the paygap is too high, middle class is struggling. But left isn't about the 'people' anymore, so they feign caring about salary and social security while they're only hysterical about the environment. When you then ask them how doubling their energy bill (or doubling flight costs, meaning many cannot even go on holiday once while they keep flying themselves) is affordable for the same people they say are struggling, their brain crashes like a computer; they never learned how to answer it since they haven't put in any thought in being a hipster 'leftist' which feels so damn cool to be.