What's the point?

O.K I know I am complaining again and I'm sort of reading The Secret so I know that one negative thought can lead to a bushel of trouble. But never-the less I am going to point out those so called secret letters that I have to type in before I can leave a comment on anyone else's blog. It is not just blogs but lots of sites that demand this test. I mean if I somehow mistake a I for a l I get another chance and if I screw that up, another chance. But let's face it even Aiden could do it. So as I said, what's the Point?