Could Democracy be considered the worse form of government?

Hm. I might favor some sort of Republic where voting was an acquired right, periodically earned by some sort of test that showed a person's mental capacity and social awareness. The problem is administering that test, and somehow making sure it stayed not only current, but also "fair." We've seen in the past what happens when only an "elite" is allowed to vote. My system would allow the "informed" and "responsible" to vote, but I have no idea how you'd actually go about instituting and enforcing such a dramatic change.