On the other hand there is the very real danger of voter disenfranchisement. According to the Brennen Institute's report hundreds of thousands of legitimate voters will be or have been purged from voter rolls due to problems as insignificant as typos, some of which are made by government employees.
So you need to ask yourself, what's worse? Registering Popeye the sailor as a voter in Delaware or disenfranchising real voters? Which one does more damage to democracy? For me, the anology is whether it's worse to have a guilty person go free or an innocent person in jail.
UPDATE: for more on ACORN and GOP allegations of voter fraud check out TUCKER: Mickey won't show up on Election Day