Crack the Code

OK, I know that this is for my own security, but I'm really fed up with those stupid online codes that you have to fill out to post something on a website, or check your credit card statement, or whatever. You know the ones that say "For security measures, please enter this code: zk6r29l" But the problem is that the freaking code is all morphed and twisted, so a normal human being can't even tell what the letters or numbers are! The whole point of them is to make sure that it's a person on the other end, but I just don't understand why they make it so damn hard.