It is always funny to me that the people making this argument are usually also the people who would view a voting literacy test as abhorrent (not you, necessarily). To me, if we're assuming a large amount of people are too stupid to understand information or know what is good, then it follows that we oughtn't let them decide the direction of the country.
I am genuinely in favor of a brief standardized test in the voting booth, but I think most aren't, especially those who are the most vocal about voter illiteracy/ignorance/stupidity. Follow through with your beliefs, readers. Pick one: are they too stupid to vote, or aren't they? If they are, support a literacy test. If they aren't, stop the ugly rhetoric.