Lowering the voting age is really stupid. And, Earl, you don't think that every parent will make sure that their kids vote the way they want? Ever heard of voting through someone else? Disabled people and the likes grant their right to vote to someone else because they can't physically perform teh act (the person is supposed to cast the vote in teh way the disabled person wants to). There will be a lot of new-borns voting that way, I can assure you. And you acn't strip them of that right, since that would be undemocratic right?
The voting age should probably be higher than it is today. Most young people make horribly poor judgements on political issues.