Let's start with:
1) Have you paid taxes for the last three years, are a citizen of the United States and have a picture ID issued by your state of residence?
Yes. congratulations qualified voter.
No. You are not qualified to vote.
That's not too bad of an idea, actually.
I had to alter my original, theoretical idea for voter restriction a while back. I used to half-jokingly espouse IQ-based voter restrictions, until I got around to joining MENSA and started attending a few member functions. There are a surprising number of idiots with high IQs - most of which seem to be in academia, for some odd reason.
For an organization that one would think to be cliquish enough based solely upon its lone membership requirement (an IQ score that puts you in the top 2% of the population), there are a few, very well defined cliques that form around certain events or conversations. The starkest contrast doesn't show up in general political conversation, as you might assume, but rather in business discussions - especially in regards to pay scales and regulation - and it is between what a few of us refer to as the "theorists" and the "practicals", i.e. the academics who theorize about business and the people who actually work in business.
I helped a fellow MENSA member in the Huntsville area develop a simulation "game" for his company to use to help identify, among other things, potential and growing management talent among his employees and prospective hires. As a bit of an inside joke, he asked a number of other members to help "test" the software - even though we knew it worked and had been in use for almost a year. All but one of the theorists who participated failed miserably, killing their companies, while the practicals all rated at least as having significant management potential.
There was a lot of interesting feedback from the theorists regarding "deficiencies" and "bugs" in the simulation software.
