For example, I think a voting licence thing where people are asked a couple fundamental questions with regard to the political system could work. You'd have it run by an independent institution of law, with the questions determined by political scientists. You'd fish out a lot of ignorant morons, and if people don't bother to show up to get their voting licence, then you fish out the disinterested voters who just vote because it's the norm to do so. It'd get more unworkable the more filters you implement and the more you try to fish out uninformed voters, but no filters at all does democracy a disservice, imo. It could work in a much more meritocratic fashion.